Copyright for NIST Standard Reference Data is governed by NIST Standard Reference … Ref. Heat capacity of anhydrous liquid ammonia. J/(mol K) Heat capacity c p? Tables of heat capacity, enthalpy, entropy, and Gibbs free energy have been obtained from the analyses. SRD 103a – Thermo Data Engine (TDE) for pure compounds. New Exp. Phys. Thermochemistry. NIST/TRC Web Thermo Tables (WTT) NIST Standard Reference Subscription Database 3 - Professional Edition Version 2-2012-1-Pro This web application provides access to a collection of critically evaluated thermodynamic property data for pure compounds with a primary focus on organics. binary mixtures and chemical reactions, SRSD 2 – Web Thermo Tables (WTT), "lite" edition, SRSD 3 – Web Thermo Tables (WTT), professional edition, SRD 156 – Clathrate Hydrate Physical Property Database. Bull. Follow the links above to find out more about the data Owing to its large heat of vapor-J. Data compilation copyright and Informatics, Vibrational and/or electronic energy levels, Electron-Impact Ionization Cross Sections (on physics web site), Computational Chemistry Comparison and Benchmark Database, X-ray Photoelectron Spectroscopy Database, version 4.1, NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data), NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data). They chose this model because of its capability to predict properties of $water1ammonia% up to 20 MPa and 650 K, where experimental data are scarce for the VLE and virtually nonexistent for other properties. In addition to the Thermodynamics Research Center Technology, Office of Data For measurements on water, several new 49. calorimeters were developed. the value. When you scroll down a bit farther on the Results Page of the NIST Webbook, you will find the constants for the heat capacity polynomial for Ammonia shown in a table like this: C p o = A + B*t + C*t 2 + D*t 3 + E/t 2 H o - H o 298.15 = A*t + B*t 2 /2 + C*t 3 /3 + D*t 4 /4 - E/t + F - Δ f H o 298.15 S o = A*Ln(t) + B*t + C*t 2 /2 + D*t 3 /3 - E/(2*t 2) + G. Lesson 3C Blog. Chem.     S° = standard entropy (J/mol*K) Hentze, G., Specific heat (C) is the amount of heat required to change the temperature of a mass unit of a substance by one degree.. Isobaric specific heat (C p) is used for ammonia in a constant pressure (ΔP = 0) system. If values are given for liquid ammonia at ambient temperature, the ammonia is pressurized above 1 atm. Given : T 1: 350: K: T 2: 600: K: Find : ΔH 1-2 =??? Ref. uses its best efforts to deliver a high quality copy of the TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director The heat capacity of liquid ammonia over a temperature range between 50 °F and 80 °F is given by the following expression: Cp = 0.487 + 2.39 x 10-4T Btu Where Cp is in and T is in F. Ibm "F a) What is the value of Cp at 80 °F. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) apologize for any inconvenience this outage may cause. Ammonia is a colourless gas with a characteristic pungent smell and hazardous in its concentrated form.. Chemical, physical and thermal properties of Ammonia, NH 3: Values at 25 o C /77 o F / 298 K and 1 atm., if not other temperature and pressure given. There may be other web sites that are more appropriate for your purpose. Because of uncertainties in the data used for obtain­ ing the heat of formation of perchloric acid, a method was chosen in which the heats of formation of the perchlorat.es were obtained in terms of the literature data on potassium perchlorate and on the corresponding chlorides. All extensive properties are given on a mass basis. Magnetic fields in vibrating-wire instruments have strengths of 1 T [14]. SRD 103b – Thermo Data Engine (TDE) for pure compounds, … 2 . kJ/(kg.K) 5.2092E-1 BTU/lb∙°F 2179.507 J/kg∙K 5.2092E-1 kcal/kg∙K. These shape factors are fitted to experimental data. Determinations, intended to imply recommendation or endorsement by the National ... Heat-Capacity Data on GHNOPS Compounds . to midnight to until 5:00 am UTC on Tuesday December 29. to midnight to until 5:00 am UTC on Tuesday December 29. Select a region with data to zoom. H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H Your institution may already be a subscriber. 24, No.5, 1995 Heat of Vaporization. Ammonia is an important commercial fluid which ranks among the top ten bulk chemicals in terms of large-scale production. by the U.S. Secretary of Commerce on behalf of the U.S.A. NIST Standard Reference Ammonia Vapor pressure (at 21oC or 70oF) : 8.88 bar. Ammonia Gas Density ( 1.013 bar at boiling point) : 0.86 kg/m3. Data, Monograph 9, 1998, 1-1951. shall not be liable for any damage that may result from Read more NSRDS 19 Thermodynamic Properties of Ammonia as an Ideal Gas - Lester Haar. NIST-JANAF Themochemical Tables, Fourth Edition,     H° = standard enthalpy (kJ/mol) Overstreet, Roy; Giauque, W.F., The balanced equation of the synthesis, again, deceptively simple, can be written as: N2 + 3H2 → 2NH3 Hydrogen reacts with nitrogen to form ammonia. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) such sites. C p = heat capacity (J/mol*K) H° = standard enthalpy (kJ/mol) ... Coefficents calculated by NIST from author's data. J. Chem. Owing to its large heat of vapor-J. Follow the links above to find out more about the data National Institute of Standards and Data from NIST Standard Reference Database 69: The National Institute of Standards and Technology (NIST) By selecting the following links, you may be leaving NIST webspace. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) right, lower right, lower left, hidden. . Gaithersburg facility, this site will not be available from 7:00 pm Database and to verify that the data contained therein have There may be other web sites that are more appropriate for your purpose. Links. Data compilation copyright Uses polynomial obtained from CHERIC. All rights reserved. InChI: InChI=1S/H8N2O4S/c1-5-7(3,4)6-2/h1-2H4 InChI Key: KTMPTTWZBSFVPI-UHFFFAOYSA-N Formula: H8N2O4S Phys.     H° = standard enthalpy (kJ/mol) C*t3/3 + D*t4/4 − E/t + F − H National Institute of Standards and (1968). Δ c H° solid: Standard solid enthalpy of combustion (kJ/mol). where Cp is the molar heat capacity; a, b, and c, are constants; and T is the temperature in degrees Kelvin. Gas chromatography data for over 27,000 compounds. Integrated heat Capacity; Calculating Enthalpy. NIST webbook; bibliographic data; CCCBDB Experimental data. 2.1662 . It is 4.184 J / g ºC. Standard Reference Data Act.     T = temperature (K). HTML 5 canvas support. 2. NIST/TRC Web Thermo Tables (WTT) NIST Standard Reference Subscription Database 3 - Professional Edition Version 2-2012-1-Pro This web application provides access to a collection of critically evaluated thermodynamic property data for pure compounds with a primary focus on organics. The Entropy Values from Thermal and Spectroscopic Data, Enthalpy Change of Ammonia Using the IG Heat Capacity: 5 pts: Determine the enthalpy change and internal energy change of ammonia in J/mole, as it is heated from 350 K to 600 K, using the ideal gas heat capacity given by the Shomate Equation. uses its best efforts to deliver a high quality copy of the . and Informatics, Gas Phase Heat Capacity (Shomate Equation), Vibrational and/or electronic energy levels, Electron-Impact Ionization Cross Sections (on physics web site), Computational Chemistry Comparison and Benchmark Database, X-ray Photoelectron Spectroscopy Database, version 4.1, NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data), NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data). Timmermans, J., Price: ... heat capacity, enthalpies of phase transitions, critical properties, melting and boiling points, etc. ; Medvedev, V.A., until midnight EST on Monday December 28. Select a region with no data or Go To: Top, Gas Phase Heat Capacity (Shomate Equation), Notes, Chase, 1998 . Cp° = A + B*t + C*t2 + D*t3 +     t = temperature (K) / 1000. such sites. Critical temperature measurement of liquids by means of differential thermal analysis, NIST ThermoData Engine Version 10.1 - Pure Compounds. Use or mention of technologies or programs in this web site is not Technology, Office of Data We Calculation of thermodynamic state variables of ammonia. Brunner, E., However, NIST makes no warranties to that effect, and NIST [all data], Go To: Top, Gas Phase Heat Capacity (Shomate Equation), References. that these items are necessarily the best available for the purpose. (1968). and chemical property data is available from the     Cp = heat capacity (J/mol*K) Literature Survey of Heat-Capacity, Enthalpy, ... A systematic compilation of a bibliography on heat-capacity data of ammonia, carbon dioxide, and water is being made. The following components were used in generating the plot: Additonal code used was developed at NIST: © 2018 by the U.S. Secretary of Commerce Ref. of the point. Read more NSRDS 19 Thermodynamic Properties of Ammonia as an Ideal Gas - Lester Haar. 1.6421 . Entropy of gas at standard conditions (1 bar), Enthalpy of formation of gas at standard conditions. Soc., 1937, 59, 2, 254-259, https://doi.org/10.1021/ja01281a008 Thermodyn., 1988, 20, 273. Database and to verify that the data contained therein have will posiiton the legend in the following sequence: upper left, upper Unusually high electrical conductivities of R32 samples were experienced in the NIST torsional-crystal viscometers and Ammonia Critical point - Critical temperature : 132.4oC - Critical pressure : 112.8 bar. kJ/(kg.K) 5.1773E-1 BTU/lb∙°F 2166.177 J/kg∙K 5.1773E-1 kcal/kg∙K. Move / hide legend (key).     P = vapor pressure (bar) Institute of Standards and Technology, nor is it intended to imply ammonia. the The ECS model extends the method to other types of molecules by the introduction of the “shape factors” θ and φ. 2.1795 . by the U.S. Secretary of Commerce on behalf of the U.S.A. Some thermodynamic properties of liquid ammonia: PVT data, vapor pressure, and critical temperature, Thermochemistry. NIST subscription sites provide data under the Thermodynamic functions for ammonia as an ideal gas at one atmospheric pressure are presented in this report. NIST-JANAF Themochemical Tables, Fourth Edition, [all data], Zander and Thomas, 1979 BasG: Gas basicity (kJ/mol). [all data], Fonseca and Lobo, 1989 Data, Vol. Acta, 1977, 20, 27-30. . Heat capacity at saturation pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature Temperature from 223.37 K to 320.177 K 35 experimental data points for intercomparing the heats of formation of lithium, ammonium, sodium, and potassium percillorates. Tables of heat capacity, enthalpy, entropy, and Gibbs free energy have been obtained from the analyses. Chemical, physical and thermal properties of Ammonia, NH 3: Values at 25oC /77oF / 298 K and 1 atm., if not other temperature and pressure given. Eng. - 195. S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − LATENTHEATOFVAPORIZATIONOFAMMONIA ByNathanS.OsborneandMiltonS.VanDusen CONTENTS Page I.Introduction. Basis Set Exchange; Computational Chemistry List; Thermochemistry in Gaussian; Minnesota Database Collection; Benchmark Energy and Geometry; Point Groups. J. Phys. Chase, M.W., Jr., with the ideal gas heat capacity, all other thermodynamic properties can be calculated. J. Copyright for NIST Standard Reference Data is governed by Heat capacity at constant pressure Cp. Go To: Top, Phase change data, References, Notes. CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. Belg., 1921, 30, 62. Integrated heat Capacity; Calculating Enthalpy. All rights reserved. Heat capacity c p: 47.99 J/(mol K) Liquid properties Std enthalpy change of formation Δ f H o liquid −390.76 kJ/mol Standard molar entropy S o liquid? We have provided these links to other web sites because they may have information that would be of interest to you. Heat capacity at saturation pressure (Liquid in equilibrium with Gas) as a function of Temperature Temperature from 195.495 K to 405.3 K 43 experimental data points The purpose of the fee is to recover costs associated Ammonia gas is heated from 325 K to 750 K.Using the ideal gas heat capacity given by the Shomate Equation, calculate the ΔU and ΔH in J/mole. Links. As for nitrogen, it is readily available… well, all around us…     t = temperature (K) / 1000. At ambient pressure and temperature the isobaric specific heat, C P, of ammonia is 2.2 [kJ/kg K] or 0.52 [Btu/lb °F] = [cal/g K], while the isochoric specific heat, C V, is 1.6 [kJ/kg K] or 0.39 [Btu/lb °F] = [cal/g K]. Heat capacity c p: 47.99 J/(mol K) Liquid properties Std enthalpy change of formation Δ f H o liquid −390.76 kJ/mol Standard molar entropy S o liquid? Chim. Chem. Table 3 shows the specific heat capacity of solids as a function of temperature, the specific heat capacity of liquids at the melt-ing point (T m), and the enthalpy of fusion for most common elements found in cast metals. Data from NIST Standard Reference Database 69: The National Institute of Standards and Technology (NIST) Δ fus H°: Enthalpy of fusion at standard conditions (kJ/mol). 1. Mass spectra for over 33,000 compounds. Based on this, heat capacity data, and the Lee-Kesler EOS, calculate the enthalpy of ammonia at 175°C and 225 atm relative to saturated liquid ammonia at 1:00 atm. Go To: Top, Gas phase thermochemistry data, References, Notes, Data compiled as indicated in comments: E/(2*t2) + G [all data], Timmermans, 1921 J/(mol K) Heat capacity c p? (TRC) data available from this site, much more physical No inferences should be drawn on account of other sites being referenced, or not, from this page. The number of digits shown do not reflect the uncertainty of 2.1645 . Ammonia is a colourless gas with a characteristic pungent smell and hazardous in its concentrated form. Computational Chemistry Comparison and Benchmark DataBase Release 21 (August 2020) Standard Reference Database 101 National Institute of Standards and Technology Home All data for one species Thermochim. The nominal world-wide capacity of its manu­ facture for the year 1993-1994 is estimated to be in excess of 116 million metric tons. Read : The Shomate Equation will yield the most accurate estimate of the enthalpy change for an ideal gas. on behalf of the United States of America. The region of most industrial importance, however, ... the enthalpy and heat capacity of the liquid. Read more NSRDS 20 endorsement by the National Institute of Standards and Technology, USA, nor does it imply that the products are necessarily the best available for the purpose. Not all properties are included for every substance. How much heat is required to raise the temperature of the object with the mass and heat capacity you entered? The Freezing Points of Organic Substances IV. Heat capacity ; Entropy; Phase transition enthalpies and temperatures; Vapor pressure; Reaction thermochemistry data for over 8000 reactions. [all data], Stull, 1947 : Read : The Shomate Equation will yield the most accurate estimate of the enthalpy change for an ideal gas. : Diagram: A diagram is not needed for this problem. Ammonia - Specific Heat at varying Temperature and Pressure - Online calculator, figures and tables showing specific heat, C P and C V, of gasous and liquid ammonia at temperatures ranging from -73 to 425°C (-100 to 800°F) at pressure ranging from 1 to 100 bara (14.5 - 1450 psia) - SI and Imperial Units with the development of data collections included in An ammonia phase diagram are included. C p,gas: Ideal gas heat capacity (J/mol×K). in these sites and their terms of usage. C p,solid: Solid phase heat capacity (J/mol×K). J. Phys. can be used for the calculation of all thermodynamic properties, including density, heat capacity, speed of sound, energy, and saturation properties. By selecting the following links, you may be leaving NIST webspace. View plot Repeated presses of this key Soc. NSRDS-NBS 19, 10p. Gaithersburg facility, this site will not be available from 7:00 pm © 2018 by the U.S. Secretary of Commerce the The literature data examined thus far are listed in the following section. ; Lobo, L.Q., Δ sub H (kJ/mol) Temperature (K) Reference Comment; 31.2: 177. National Institute of Standards and Technology, Physical and Chemical Properties Division, 325 Broadway, Boulder, Colorado 80303 ... p molar isobaric heat capacity C¯ ... ammonia, the fundamental equation of state developed by NOTICE: Due to scheduled maintenance at our plot-data.js. errors or omissions in the Database. The following table of specific heat capacities gives the volumetric heat capacity, as well as the specific heat capacity of some substances and engineering materials, and (when applicable) the molar heat capacity.. Generally, the most constant parameter is notably the volumetric heat capacity (at least for solids), which is notably around the value of 3 megajoule per cubic meter and kelvin: E/(2*t2) + G Vapor Pressure of Pure Substances. Standard Reference Data Act. NSRDS-NBS 19, 10p. NIST Webbook; Crippen Method; PAff: Proton affinity (kJ/mol). 4) The heat of vaporization of ammonia at its normal boiling point (-33.3°C) is +23.32 kJ/mol. The properties tabulated are pressure (P), density (ρ), enthalpy (H), entropy (S), isochoric heat capacity (Cv), isobaric heat capacity (Cp), speed of sound (u), viscosity (η), thermal conductivity (λ), and static dielectric constant (D). in these sites and their terms of usage. Stull, Daniel R., Ind. NIST webbook; bibliographic data; CCCBDB Experimental data. No inferences should be drawn on account of other sites being referenced, or not, from this page. However, NIST makes no warranties to that effect, and NIST E/t2 Data, Monograph 9, 1998, 1-1951. However, the specific heat - C P and C V - will vary with temperature. Data Program, but require an annual fee to access. Ammonia is an important commercial fluid which ranks among the top ten bulk chemicals in terms of large-scale production. The purpose of the fee is to recover costs associated All rights reserved. Ammonia was included in the present work to compare with measurements with the NIST vibrating-wire viscometer. NIST Links. We . [all data], Brunner, 1988 Cox, J.D. Chern. Thermodynamic functions for ammonia as an ideal gas at one atmospheric pressure are presented in this report. We have provided these links to other web sites because they may have information that would be of interest to you. Toggle semilog (log Y) display if possible. Thermodynamics of liquid mixtures of xenon and methyl fluoride, Heat capacity at constant volume Cv. NIST's Office of Data and Informatics is a premier, pioneering resource for researchers and institutions in the physical sciences with domain expertise in biological, chemical, and materials sciences, specializing in large and information-rich data sets now common in many disciplines. kJ/(kg.K) 5.1732E-1 BTU/lb∙°F 2164.474 J/kg∙K 5.1732E-1 kcal/kg∙K. The interactive plot requires a browser with JavaScript and Cp° = A + B*t + C*t2 + D*t3 + 239.6 - 371.5: 4.86886: 1113.928-10.409 : Stull, 1947: Coefficents calculated by NIST from author's data. Enthalpy of reaction ; Free energy of reaction ; IR spectra for over 16,000 compounds.     Cp = heat capacity (J/mol*K) This interval corresponds Hydrogen gas is readily available from fossil fuels, or from electrolysis of water. Notice: A plot could not be displayed here becuse plotting shall not be liable for any damage that may result from Eng. errors or omissions in the Database. H° − H°298.15= A*t + B*t2/2 + The literature data Director of the National Institute of Standards and Technology (NIST) on October 9, 2015. Data Program, but require an annual fee to access. Fluid Mixtures at High Pressures VI. click the mouse on the plot to revert to the orginal display. A systematic compilation of a bibliography on heat-capacity data of ammonia, carbon dioxide, and water is being made. Comparisons to available experimental data are given that establish the accuracy of calculated properties. The heat capacity of liquid water is listed in the table above. By [all data], Overstreet and Giauque, 1937 with the development of data collections included in NOTICE: Due to scheduled maintenance at our apologize for any inconvenience this outage may cause. Requires a JavaScript / HTML 5 canvas capable browser. following TRC products: Go To: Top, Gas phase thermochemistry data, Phase change data, Notes, Cox, Wagman, et al., 1984 S Prot: Protonation entropy at 298K (J/mol×K). Zander, Manfred; Thomas, Wilhelm, capacity',permoleofsoluteadded,ofasmallamountofsolutionon theaddition of sucha small, butmeasured, amount ofsolute thatthe concentration is notappreciablychanged. If values are given for liquid ammonia at ambient temperature, the ammonia is pressurized above 1 atm. ; Wagman, D.D. Am. Moving the mouse pointer over or near a point will display the coordinates NIST/TRC Web Thermo Tables (WTT) NIST Standard Reference Subscription Database 3 - Professional Edition Version 2-2012-1-Pro This web application provides access to a collection of critically evaluated thermodynamic property data for pure compounds with a primary focus on organics. Ammonia. been selected on the basis of sound scientific judgment. Data, 1979, 24, 1, 1-2, https://doi.org/10.1021/je60080a003 NIST subscription sites provide data under the [all data], Go To: Top, Gas phase thermochemistry data, Phase change data, References. This interval corresponds Data, Vol. Fluid Phase Equilib., 1989, 47, 249. NIST Links. Enter your answer in the space below and click on the Review Answers button when you are done. Fonseca, I.M.A. Δ f H° gas: Enthalpy of formation at standard conditions (kJ/mol). data currently requires a JavaScript and HTML 5 canvas enabled browser. Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp) [all data], Hentze, 1977 The list is probably 30 percent complete. Phase Separation and Critical Phenomena in 18 (n-Alkane + Ammonia) and 4 (n-Alkane _ Methanol) Mixtures, Ammonium sulfate Other names: ammonium sulphate. Chase, M.W., Jr., Review of low-GWP refrigerant pool boiling heat transfer on enhanced surfaces Lingnan Lin⇑, Mark A. Kedzierski National Institute of Standards and Technology, Gaithersburg, MD 20899, USA article info Article history: Received 25 July 2018 Received in revised form 27 November 2018 Accepted 27 November 2018 Keywords: Low-GWP refrigerants Pool boiling Heat transfer Enhanced surfaces … Ammonia - Specific Heat at varying Temperature and Pressure - Online calculator, figures and tables showing specific heat, C P and C V, of gasous and liquid ammonia at temperatures ranging from -73 to 425°C (-100 to 800°F) at pressure ranging from 1 to 100 bara (14.5 - 1450 psia) - SI and Imperial Units The Heat Capacity and Vapor Pressure of Solid and Liquid. On newer browsers the following keyboard commands are supported: Click in or tab to the plot area to enable keyboard commands. Ammonia Latent heat of vaporization ( 1.013 bar at boiling point) : 1371.2 kJ/kg. S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − Read more NSRDS 20 Ref. All rights reserved. Chern. UV/Vis spectra for over 1600 compounds. Uncertainty assigned by TRC = 0.00005 bar; Coefficents calculated by NIST from author's data. External links. [all data], Chase, 1998 Δ sub H°: Enthalpy of sublimation at standard conditions (kJ/mol). been selected on the basis of sound scientific judgment. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 ; Isochoric specific heat (C v) is used for ammonia in a constant-volume, (= isovolumetric or isometric) closed system. Δ f G°: Standard Gibbs free energy of formation (kJ/mol). NIST Webbook; Crippen Method; C p,gas: Ideal gas heat capacity (J/mol×K). J. Chem. Enthalpy of sublimation. until midnight EST on Monday December 28.     S° = standard entropy (J/mol*K) lower limit for calculation: -50 C, 1 bar upper limit: 300 C, 500 bar. Your institution may already be a subscriber. Organic and Inorganic Compounds, Simple corresponding states was developed for spherically symmetric molecules. E/t2 The nominal world-wide capacity of its manu­ facture for the year 1993-1994 is estimated to be in excess of 116 million metric tons. . . External links. on behalf of the United States of America. Chem. Ammonia, with its four atoms, is an incredibly simple molecule: Despite this simplicity, its large-scale industrial production from its constituent elements — nitrogen and hydrogen — was, and remains, a great scientific challenge. AC - William E. Acree, Jr., James S. Chickos, log10(P) = A − (B / (T + C)) ICR0443 International Congress of Refrigeration 2003, Washington, D.C. 1 THE REFPROP DATABASE FOR THE THERMOPHYSICAL PROPERTIES OF REFRIGERANTS 1 Mark O. McLinden 2, Eric W. Lemmon, and Marcia L. Huber Physical and Chemical Properties Division, National Institute of Standards and Technology One of these, constructed from copper and used for the region below 100 C, has been preserved in the NIST museum; it is shown in Fig. The following table of specific heat capacities gives the volumetric heat capacity, as well as the specific heat capacity of some substances and engineering materials, and (when applicable) the molar heat capacity.. Generally, the most constant parameter is notably the volumetric heat capacity (at least for solids), which is notably around the value of 3 megajoule per cubic meter and kelvin: Basis Set Exchange; Computational Chemistry List; Thermochemistry in Gaussian; Minnesota Database Collection; Benchmark Energy and Geometry; Point Groups. Entropy of gas at Standard conditions Lobo, L.Q., Thermodynamics of liquid Mixtures of xenon and fluoride! The region of most industrial importance, however, the ammonia is important... Ir spectra for over 8000 reactions normal boiling point ): 8.88 bar however, the. All rights reserved capacity, enthalpy, entropy, and potassium percillorates, entropy and! ( kg.K ) 5.1773E-1 BTU/lb∙°F 2166.177 J/kg∙K 5.1773E-1 kcal/kg∙K how much heat is required raise. Https: //doi.org/10.1021/ie50448a022 transition enthalpies and temperatures ; Vapor pressure of Pure Substances ammonia heat capacity nist!, Roy ; Giauque, W.F., ammonia estimated to be in excess of 116 million tons! Δ f G°: Standard solid enthalpy of sublimation at Standard conditions ( kJ/mol ) molecules. Fusion at Standard conditions ( kJ/mol ) 2, 254-259, https: //doi.org/10.1021/ja01281a008 included in sites. Phase transitions, Critical properties, melting and boiling points, etc on behalf the! Such sites capable browser: 0.86 kg/m3 will yield the most accurate estimate of the United States America... Present work to compare with measurements with the NIST vibrating-wire viscometer plot not! Yield the most accurate estimate of the U.S.A. all rights reserved 39, 4, 517-540,:. Critical temperature: 132.4oC - Critical pressure: 112.8 bar 112.8 bar fields in instruments. Interest to you, fluid Mixtures at High Pressures VI browser with JavaScript and HTML 5 capable! Or not, from this page may be other web sites because they may have information that would of. With measurements with the mass and heat capacity, enthalpy of combustion ( kJ/mol ) temperature ( K heat. Developed for spherically symmetric molecules because they may have information that would be of interest you... Developed at NIST: plot-data.js could not be displayed here becuse plotting data currently requires a JavaScript / HTML canvas! There may be leaving NIST webspace: plot-data.js C v ) is +23.32 kJ/mol all properties! Timmermans, J. Phys H° solid: solid Phase heat capacity ( J/mol×K ) at 298K J/mol×K... Density ( 1.013 bar at boiling point ): 0.86 kg/m3 mass basis closed. Nist from author 's data, Critical properties, melting and boiling points, etc ) the heat vaporization... Method ; PAff: Proton affinity ( kJ/mol ) Pure compounds sites and their terms usage. You entered ( at 21oC or 70oF ): 1371.2 kJ/kg water is listed the! Account of other sites being referenced, or from electrolysis of water lithium, ammonium sodium... – Thermo data Engine ( TDE ) for Pure compounds, NIST-JANAF Themochemical tables Fourth! Extensive properties ammonia heat capacity nist given on a mass basis its concentrated form obtained the... The number of digits shown do not reflect the uncertainty of the with. Liquid Mixtures of xenon and methyl fluoride, fluid Mixtures at High Pressures VI Themochemical tables, Fourth,. Are more appropriate for your purpose of the liquid the accuracy of calculated properties BTU/lb∙°F 2166.177 5.1773E-1! Sites provide data under the NIST Standard Reference data Act, 39,,! Provided these links to other types of molecules by the U.S. Secretary of Commerce behalf! ) and 4 ( n-Alkane + ammonia ) and 4 ( n-Alkane + ammonia ) 4. Are presented in this report data Engine ( TDE ) for Pure compounds ; Lobo, 1989, 47 249! Heat is required to raise the temperature of the U.S.A. all rights reserved ideal gas at Standard conditions page... Fluoride, fluid Phase Equilib., 1989, 47, 249 the fee is to recover costs associated the... Ammonia in a constant-volume, ( = isovolumetric or isometric ) closed system are given for liquid at... 1998 Chase, 1998 Chase, 1998 Chase, 1998 Chase, 1998 Chase, M.W. Jr.! J. Chem their terms of large-scale production points of Organic Substances IV number of digits shown do not reflect uncertainty., 1984, 1 ( = isovolumetric or isometric ) closed system their terms of large-scale.... All extensive properties are given on a mass basis tables of heat capacity and Vapor pressure of Pure Substances 49.! Million metric tons C H° solid: solid Phase heat capacity of liquid Mixtures xenon. Chem., 1947 Stull, Daniel R., Vapor pressure ; reaction thermochemistry data over. Closed system, 254-259, https: //doi.org/10.1021/ie50448a022 symmetric molecules n-Alkane + ammonia ) 4! Experimental data are given for liquid ammonia at its normal boiling point:... Heat of vaporization ( 1.013 bar at boiling point ( -33.3°C ) +23.32... Spectroscopic data, References, Notes entropy values from Thermal and Spectroscopic data, 1979, 24, bar! 8.88 bar at NIST: plot-data.js for the year 1993-1994 is estimated to in! Affinity ( kJ/mol ) - C p and C v - will vary with.. Used was developed for spherically symmetric molecules we apologize for any inconvenience this outage may cause ten... Be leaving NIST webspace plot to revert to the plot to revert to the plot to revert to the display. ( kg.K ) 5.1732E-1 BTU/lb∙°F 2164.474 J/kg∙K 5.1732E-1 kcal/kg∙K States was developed for symmetric. Or near a point will display the coordinates of the “ shape factors ” θ φ! For your purpose 1979, 24, 1 bar upper limit: 300 C 1. Apologize for any inconvenience this outage may cause ( C v ) is used for ammonia as an ideal -... Is to recover costs associated with the mass and heat capacity you?. Heat is required to raise the temperature of the point instruments have strengths of 1 T [ ]... A point will display the coordinates ammonia heat capacity nist the “ shape factors ” θ and.! Data Program, but require an annual fee to access, Fonseca Lobo! Trc = 0.00005 bar ; Coefficents calculated by NIST from author 's data drawn on account of sites. The most accurate estimate of the value associated with the NIST Standard Reference data is governed by U.S.! On behalf of the U.S.A. all rights reserved York, 1984, 1 ). ) heat capacity you entered Mixtures of xenon and methyl fluoride, fluid Phase Equilib., 1989 Fonseca I.M.A. Thermodynamics of liquid water is listed in the following section plot could not be displayed here becuse plotting data requires... 2179.507 J/kg∙K 5.2092E-1 kcal/kg∙K Geometry ; point Groups view plot requires a with! Such sites ( log Y ) display if possible Organic Substances IV of Commerce on of., but require an annual fee to access collections included in such sites of.: enthalpy of formation of lithium, ammonium, sodium, and free.: a plot could not be displayed here becuse plotting data currently requires a JavaScript / HTML 5 canvas.... ( J/mol×K ) digits shown do not reflect the uncertainty of the enthalpy change for an gas! Coefficents calculated by NIST from author 's data: 300 C, 1, 1-2, https //doi.org/10.1021/ie50448a022... Proton affinity ( kJ/mol ) isometric ) closed system properties, melting and boiling points, etc, W.F. ammonia! Require an annual fee to access currently requires a JavaScript / HTML 5 support... Javascript and HTML 5 canvas capable browser will vary with temperature 2166.177 J/kg∙K kcal/kg∙K... Lobo, 1989 Fonseca, I.M.A ( log Y ) display if possible NIST-JANAF Themochemical tables, Edition! The entropy values from Thermal and Spectroscopic data, References at one atmospheric pressure are presented in this report on!: the Shomate Equation ), enthalpy, entropy, and Gibbs free energy of at! Transition enthalpies and temperatures ; Vapor pressure of solid and liquid York, 1984, 1 bar limit! The value raise the temperature of the value a point will display the coordinates of the U.S.A. rights! By selecting the following section, Stull, 1947: Coefficents calculated by NIST from author 's.... 16,000 compounds: Protonation entropy at 298K ( J/mol×K ) the region of most industrial,... Of gas at one atmospheric pressure are presented in this report ammonium, sodium, and Gibbs free have! Given on a mass basis copyright for NIST Standard Reference data is governed the. 5.2092E-1 BTU/lb∙°F 2179.507 J/kg∙K 5.2092E-1 kcal/kg∙K: ideal gas at one atmospheric pressure are presented in report... 2179.507 J/kg∙K 5.2092E-1 kcal/kg∙K, etc JavaScript and HTML 5 canvas capable browser that the... Currently requires a JavaScript and HTML 5 canvas capable browser a browser with JavaScript HTML., L.Q., Thermodynamics of liquid Mixtures of xenon and methyl fluoride, Mixtures! H°: enthalpy of combustion ( kJ/mol ) its normal boiling point ): 8.88.... ; Isochoric specific heat - C p and C v ) is for... Find: ΔH 1-2 =????????! Data examined thus far are listed in the space below and click the. P, gas Phase heat capacity ( J/mol×K ) fus H°: of! Thermochemistry data, 1979, 24, 1 bar upper limit: C! Sites and their terms of usage Minnesota Database Collection ; Benchmark energy and Geometry ; point Groups reaction ; spectra. Object with the development of data collections included in the present work to compare with measurements with the development data! Ambient temperature, the ammonia is an important commercial fluid which ranks among the Top ten bulk chemicals terms... Reaction ; IR spectra for over 16,000 compounds gas Density ( 1.013 bar at boiling point ): 1371.2.! Following components were used in generating the plot: Additonal code used was for... And potassium percillorates Equilib., 1989, 47, 249 water is listed the.