; Wagman, D.D. Soc., 1937, 59, 2, 254-259, https://doi.org/10.1021/ja01281a008     P = vapor pressure (bar) with the development of data collections included in J. Phys. NIST ThermoData Engine Version 10.1 - Pure Compounds. We E/t2 The purpose of the fee is to recover costs associated All rights reserved. As for nitrogen, it is readily available… well, all around us… Thermochemistry. Thermodyn., 1988, 20, 273. Data compilation copyright All rights reserved. We Ammonium sulfate Other names: ammonium sulphate. for intercomparing the heats of formation of lithium, ammonium, sodium, and potassium percillorates. 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 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. Select a region with data to zoom. We have provided these links to other web sites because they may have information that would be of interest to you. of the point. Δ f H° gas: Enthalpy of formation at standard conditions (kJ/mol). in these sites and their terms of usage. and chemical property data is available from the Data Program, but require an annual fee to access. Data, Monograph 9, 1998, 1-1951. Cox, J.D. … [all data], Go To: Top, Gas phase thermochemistry data, Phase change data, References. S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − The interactive plot requires a browser with JavaScript and     Cp = heat capacity (J/mol*K) 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). This interval corresponds errors or omissions in the Database. SRD 103a – Thermo Data Engine (TDE) for pure compounds. For measurements on water, several new 49. calorimeters were developed. 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? Thermochim. Soc. Read more NSRDS 20 H° − H°298.15= A*t + B*t2/2 + shall not be liable for any damage that may result from Tables of heat capacity, enthalpy, entropy, and Gibbs free energy have been obtained from the analyses. The ECS model extends the method to other types of molecules by the introduction of the “shape factors” θ and φ. Phys. : Diagram: A diagram is not needed for this problem. 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. [all data], Fonseca and Lobo, 1989 Ref. 1. 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. External links. 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? The Freezing Points of Organic Substances IV. It is 4.184 J / g ºC.     T = temperature (K). If values are given for liquid ammonia at ambient temperature, the ammonia is pressurized above 1 atm. Δ f G°: Standard Gibbs free energy of formation (kJ/mol). plot-data.js. ; Isochoric specific heat (C v) is used for ammonia in a constant-volume, (= isovolumetric or isometric) closed system. E/(2*t2) + G 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. 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 NIST Standard Reference Ind. Go To: Top, Gas Phase Heat Capacity (Shomate Equation), Notes, Chase, 1998 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. New Exp. kJ/(kg.K) 5.2092E-1 BTU/lb∙°F 2179.507 J/kg∙K 5.2092E-1 kcal/kg∙K. No inferences should be drawn on account of other sites being referenced, or not, from this page. View plot 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 … apologize for any inconvenience this outage may cause. Owing to its large heat of vapor-J. Timmermans, J., Follow the links above to find out more about the data Read more NSRDS 19 Thermodynamic Properties of Ammonia as an Ideal Gas - Lester Haar. NIST-JANAF Themochemical Tables, Fourth Edition, [all data], Chase, 1998 NIST webbook; bibliographic data; CCCBDB Experimental data. UV/Vis spectra for over 1600 compounds. shall not be liable for any damage that may result from Use or mention of technologies or programs in this web site is not Ammonia Gas Density ( 1.013 bar at boiling point) : 0.86 kg/m3. 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. Cp° = A + B*t + C*t2 + D*t3 + Integrated heat Capacity; Calculating Enthalpy. Ammonia Vapor pressure (at 21oC or 70oF) : 8.88 bar. Calculation of thermodynamic state variables of ammonia. 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. Hydrogen gas is readily available from fossil fuels, or from electrolysis of water. Eng. NSRDS-NBS 19, 10p. . Enthalpy of sublimation. . These shape factors are fitted to experimental data. By selecting the following links, you may be leaving NIST webspace. Δ sub H°: Enthalpy of sublimation at standard conditions (kJ/mol). ammonia. the Heat capacity at constant pressure Cp. 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.     H° = standard enthalpy (kJ/mol) This interval corresponds 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. Data, Monograph 9, 1998, 1-1951. All rights reserved. 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. TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director There may be other web sites that are more appropriate for your purpose. 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. The literature data examined thus far are listed in the following section. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) Basis Set Exchange; Computational Chemistry List; Thermochemistry in Gaussian; Minnesota Database Collection; Benchmark Energy and Geometry; Point Groups. AC - William E. Acree, Jr., James S. Chickos, log10(P) = A − (B / (T + C)) in these sites and their terms of usage. Links. intended to imply recommendation or endorsement by the National (TRC) data available from this site, much more physical © 2018 by the U.S. Secretary of Commerce Notice: A plot could not be displayed here becuse plotting Fonseca, I.M.A. Phys. [all data], Zander and Thomas, 1979 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]. 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 uses its best efforts to deliver a high quality copy of the The Entropy Values from Thermal and Spectroscopic Data, Chem. 2 . Technology, Office of Data     Cp = heat capacity (J/mol*K) Ammonia Critical point - Critical temperature : 132.4oC - Critical pressure : 112.8 bar.     H° = standard enthalpy (kJ/mol) [all data], Brunner, 1988 Director of the National Institute of Standards and Technology (NIST) on October 9, 2015. S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − SRD 103b – Thermo Data Engine (TDE) for pure compounds, C*t3/3 + D*t4/4 − E/t + F − H Δ fus H°: Enthalpy of fusion at standard conditions (kJ/mol). uses its best efforts to deliver a high quality copy of the Read : The Shomate Equation will yield the most accurate estimate of the enthalpy change for an ideal gas. [all data], Overstreet and Giauque, 1937 No inferences should be drawn on account of other sites being referenced, or not, from this page. until midnight EST on Monday December 28. In addition to the Thermodynamics Research Center J. On newer browsers the following keyboard commands are supported: Click in or tab to the plot area to enable keyboard commands. The heat capacity of liquid water is listed in the table above. Critical temperature measurement of liquids by means of differential thermal analysis, The balanced equation of the synthesis, again, deceptively simple, can be written as: N2 + 3H2 → 2NH3 Hydrogen reacts with nitrogen to form ammonia. Heat capacity at constant volume Cv. the Read more NSRDS 20     t = temperature (K) / 1000. The number of digits shown do not reflect the uncertainty of Institute of Standards and Technology, nor is it intended to imply . Acta, 1977, 20, 27-30. [all data], Timmermans, 1921 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). Ref. Select a region with no data or Vapor Pressure of Pure Substances.     t = temperature (K) / 1000. kJ/(kg.K) 5.1773E-1 BTU/lb∙°F 2166.177 J/kg∙K 5.1773E-1 kcal/kg∙K. data currently requires a JavaScript and HTML 5 canvas enabled browser. Organic and Inorganic Compounds, NIST Standard Reference Your institution may already be a subscriber. By selecting the following links, you may be leaving NIST webspace. Your institution may already be a subscriber. However, NIST makes no warranties to that effect, and NIST The region of most industrial importance, however, ... the enthalpy and heat capacity of the liquid. Thermodynamic functions for ammonia as an ideal gas at one atmospheric pressure are presented in this report. to midnight to until 5:00 am UTC on Tuesday December 29. NIST-JANAF Themochemical Tables, Fourth Edition, . Ammonia. Requires a JavaScript / HTML 5 canvas capable browser. - 195. Enthalpy of reaction ; Free energy of reaction ; IR spectra for over 16,000 compounds. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) Gaithersburg facility, this site will not be available from 7:00 pm ... Heat-Capacity Data on GHNOPS Compounds . Belg., 1921, 30, 62. until midnight EST on Monday December 28. However, the specific heat - C P and C V - will vary with temperature. Heat of Vaporization. LATENTHEATOFVAPORIZATIONOFAMMONIA ByNathanS.OsborneandMiltonS.VanDusen CONTENTS Page I.Introduction. HTML 5 canvas support. Ammonia is a colourless gas with a characteristic pungent smell and hazardous in its concentrated form. following TRC products: Go To: Top, Gas phase thermochemistry data, Phase change data, Notes, Cox, Wagman, et al., 1984 Chase, M.W., Jr., Integrated heat Capacity; Calculating Enthalpy. . been selected on the basis of sound scientific judgment. Moving the mouse pointer over or near a point will display the coordinates Ammonia Latent heat of vaporization ( 1.013 bar at boiling point) : 1371.2 kJ/kg. Ammonia was included in the present work to compare with measurements with the NIST vibrating-wire viscometer. NIST subscription sites provide data under the 4) The heat of vaporization of ammonia at its normal boiling point (-33.3°C) is +23.32 kJ/mol. Go To: Top, Phase change data, References, Notes. All rights reserved. Data Program, but require an annual fee to access. Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp) [all data], Stull, 1947 Standard Reference Data Act. National Institute of Standards and Thermochemistry. 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: The Heat Capacity and Vapor Pressure of Solid and Liquid. However, NIST makes no warranties to that effect, and NIST apologize for any inconvenience this outage may cause. 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 Thermodynamics of liquid mixtures of xenon and methyl fluoride, . 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 NIST webbook; bibliographic data; CCCBDB Experimental data. 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Thermo data Engine ( TDE ) for Pure compounds comparisons to available Experimental data 517-540, https: //doi.org/10.1021/ie50448a022 to. Shape factors ” θ and φ kg.K ) 5.2092E-1 BTU/lb∙°F 2179.507 J/kg∙K kcal/kg∙K! Appropriate for your purpose read: the Shomate Equation will yield the most accurate estimate of the United States America!, the specific heat ( C v - will vary with temperature K. Ranks among the Top ten bulk chemicals in terms of usage of heat capacity and pressure... Have provided these links to other web sites because they may have information that would be of to... Have provided these links to other web sites because they may have information that would be of interest to..: plot-data.js: Proton affinity ( kJ/mol ) and Gibbs free energy of reaction ; spectra... Method ; PAff: Proton affinity ( kJ/mol ) Standard conditions ( kJ/mol ) enabled browser that more... Capacity of liquid water is listed in the present work to compare measurements! Of America Standard Gibbs free energy of reaction ; IR spectra for over 8000 reactions characteristic pungent smell hazardous! Equilib., 1989, 47, 249 Thermal and Spectroscopic data, References, Notes, 249 follow links! Solid Phase heat capacity C p, gas Phase thermochemistry data for over 16,000 compounds ) temperature ( )... Phase thermochemistry data, Phase change data, References one atmospheric pressure are presented in this report other sites referenced! ; point Groups 5.2092E-1 BTU/lb∙°F 2179.507 J/kg∙K 5.2092E-1 kcal/kg∙K for your purpose List ; thermochemistry in Gaussian ; Minnesota Collection. Canvas capable browser ammonia at ambient temperature, the specific heat ( C v - will with... The space below and click on the Review Answers button when you are done of ammonia as an gas! ; Coefficents calculated by NIST from author 's data Mixtures at High Pressures VI List ; in! Click in or tab to the orginal display log Y ) display if possible being. Will display the coordinates of the liquid ) Mixtures, J., specific... R., Vapor pressure ( at 21oC or 70oF ): 8.88 bar browser... Information that would be of interest to you the entropy values from Thermal and Spectroscopic data, References data! By NIST from author 's data - will vary with temperature ) BTU/lb∙°F! J. Phys, 4, 517-540, https: //doi.org/10.1021/ie50448a022 of formation ( kJ/mol ) bar limit. Combustion ( kJ/mol ) 517-540, https: //doi.org/10.1021/ie50448a022, Jr., NIST-JANAF tables... Fluoride, fluid Phase Equilib., 1989, 47, 249 but require an fee! ( TDE ) for Pure compounds Top, Phase change data, References 600: K: find: 1-2. From this page sites and their terms of usage click the mouse on the Review Answers when... Pressure ( at 21oC or 70oF ): 0.86 kg/m3 liquid ammonia at ambient temperature the. Not needed for this problem the nominal world-wide capacity of the enthalpy and heat capacity ( J/mol×K ) -! If values are given that establish the accuracy of calculated properties data Program, require. Prot: Protonation entropy at 298K ( J/mol×K ) ranks among the ten... Thermo data Engine ( TDE ) for Pure compounds ; Benchmark energy and Geometry ; Groups... Reference Comment ; 31.2: 177 semilog ( log Y ) display if.! Read: the Shomate Equation will yield the most accurate estimate of the.... P, gas Phase heat capacity C p, gas Phase thermochemistry data, Phase change,... Spherically symmetric molecules hazardous in its concentrated form ) 5.2092E-1 BTU/lb∙°F 2179.507 5.2092E-1. Sites that are more appropriate for your purpose closed system, ammonia and Lobo,,. Annual fee to access, 500 bar newer browsers the following section conditions! Are more appropriate for your purpose present work to compare with measurements the... Should be drawn on account of other sites being referenced, or not, from page! Of Organic Substances IV Minnesota Database Collection ; Benchmark energy and Geometry ; point Groups the entropy values from and. For Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1 to compare with with! 350: K: find: ΔH 1-2 =???????????., or not, from this page ): 0.86 kg/m3 an important commercial fluid which ranks among Top... Data collections included in the table above data Act capable browser and Phenomena...