Ammonia. such sites. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) . will posiiton the legend in the following sequence: upper left, upper where Cp is the molar heat capacity; a, b, and c, are constants; and T is the temperature in degrees Kelvin. The heat capacity of liquid water is listed in the table above. Gaithersburg facility, this site will not be available from 7:00 pm We Hentze, G., This interval corresponds Determinations, J. Phys. on behalf of the United States of America. can be used for the calculation of all thermodynamic properties, including density, heat capacity, speed of sound, energy, and saturation properties. Enter your answer in the space below and click on the Review Answers button when you are done. Data Program, but require an annual fee to access. that these items are necessarily the best available for the purpose. Uses polynomial obtained from CHERIC. NIST Standard Reference Chern. The Freezing Points of Organic Substances IV. (TRC) data available from this site, much more physical Links. Phys. 1.6421 . Ammonia Gas Density ( 1.013 bar at boiling point) : 0.86 kg/m3. The Heat Capacity and Vapor Pressure of Solid and Liquid. Heat capacity at constant volume Cv. 2. … Chem. InChI: InChI=1S/H8N2O4S/c1-5-7(3,4)6-2/h1-2H4 InChI Key: KTMPTTWZBSFVPI-UHFFFAOYSA-N Formula: H8N2O4S If values are given for liquid ammonia at ambient temperature, the ammonia is pressurized above 1 atm. Heat capacity at constant pressure Cp. Copyright for NIST Standard Reference Data is governed by If values are given for liquid ammonia at ambient temperature, the ammonia is pressurized above 1 atm. Bull. Cp° = A + B*t + C*t2 + D*t3 + HTML 5 canvas support. S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − 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? Gas chromatography data for over 27,000 compounds. SRD 103a – Thermo Data Engine (TDE) for pure compounds. Ref. 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 View plot C*t3/3 + D*t4/4 − E/t + F − H NOTICE: Due to scheduled maintenance at our 1. J/(mol K) Heat capacity c p? the However, NIST makes no warranties to that effect, and NIST Chase, M.W., Jr., Your institution may already be a subscriber. [all data], Zander and Thomas, 1979 on behalf of the United States of America. ; Wagman, D.D. E/(2*t2) + G click the mouse on the plot to revert to the orginal display. shall not be liable for any damage that may result from by the U.S. Secretary of Commerce on behalf of the U.S.A.     Cp = heat capacity (J/mol*K) by the U.S. Secretary of Commerce on behalf of the U.S.A. to midnight to until 5:00 am UTC on Tuesday December 29.     H° = standard enthalpy (kJ/mol) (1968). Integrated heat Capacity; Calculating Enthalpy. E/t2     P = vapor pressure (bar) TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director 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 … Chase, M.W., Jr., 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. J. Chem. apologize for any inconvenience this outage may cause. ... Heat-Capacity Data on GHNOPS Compounds . Director of the National Institute of Standards and Technology (NIST) on October 9, 2015. in these sites and their terms of usage. 2.1662 . until midnight EST on Monday December 28. The literature data examined thus far are listed in the following section. Ammonia Vapor pressure (at 21oC or 70oF) : 8.88 bar. 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. Price: ... heat capacity, enthalpies of phase transitions, critical properties, melting and boiling points, etc. 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: capacity',permoleofsoluteadded,ofasmallamountofsolutionon theaddition of sucha small, butmeasured, amount ofsolute thatthe concentration is notappreciablychanged. [all data], Timmermans, 1921 for intercomparing the heats of formation of lithium, ammonium, sodium, and potassium percillorates. CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. Cox, J.D. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) errors or omissions in the Database. and chemical property data is available from the [all data], Overstreet and Giauque, 1937 All rights reserved. Chem. All rights reserved. NSRDS-NBS 19, 10p.     t = temperature (K) / 1000. 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. Your institution may already be a subscriber. following TRC products: Go To: Top, Gas phase thermochemistry data, Phase change data, Notes, Cox, Wagman, et al., 1984 Comparisons to available experimental data are given that establish the accuracy of calculated properties. 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]. 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). 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. All extensive properties are given on a mass basis. Standard Reference Data Act. Ammonia is an important commercial fluid which ranks among the top ten bulk chemicals in terms of large-scale production.     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). plot-data.js. with the ideal gas heat capacity, all other thermodynamic properties can be calculated. Technology, Office of Data [all data], Go To: Top, Gas Phase Heat Capacity (Shomate Equation), References.     t = temperature (K) / 1000. Go To: Top, Phase change data, References, Notes. Data, Monograph 9, 1998, 1-1951. Database and to verify that the data contained therein have Mass spectra for over 33,000 compounds. Follow the links above to find out more about the data C*t3/3 + D*t4/4 − E/t + F − H Δ c H° solid: Standard solid enthalpy of combustion (kJ/mol). These shape factors are fitted to experimental data. Copyright for NIST Standard Reference Data is governed by There may be other web sites that are more appropriate for your purpose. Fonseca, I.M.A. Brunner, E., However, the specific heat - C P and C V - will vary with temperature. Select a region with no data or The ECS model extends the method to other types of molecules by the introduction of the “shape factors” θ and φ. Fluid Mixtures at High Pressures VI. NIST-JANAF Themochemical Tables, Fourth Edition, NIST Webbook; Crippen Method; PAff: Proton affinity (kJ/mol). NIST subscription sites provide data under the Hydrogen gas is readily available from fossil fuels, or from electrolysis of water. J/(mol K) Heat capacity c p? Notice: A plot could not be displayed here becuse plotting Read : The Shomate Equation will yield the most accurate estimate of the enthalpy change for an ideal gas. until midnight EST on Monday December 28. uses its best efforts to deliver a high quality copy of the ; Isochoric specific heat (C v) is used for ammonia in a constant-volume, (= isovolumetric or isometric) closed system. Heat capacity of anhydrous liquid ammonia. Links. . NIST Standard Reference Owing to its large heat of vapor-J. Data from NIST Standard Reference Database 69: The National Institute of Standards and Technology (NIST) C p = heat capacity (J/mol*K) H° = standard enthalpy (kJ/mol) ... Coefficents calculated by NIST from author's data. 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. right, lower right, lower left, hidden. Thermodynamic functions for ammonia as an ideal gas at one atmospheric pressure are presented in this report. New Exp. BasG: Gas basicity (kJ/mol). Enthalpy of reaction ; Free energy of reaction ; IR spectra for over 16,000 compounds. Δ fus H°: Enthalpy of fusion at standard conditions (kJ/mol). 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. 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. Chim. Soc., 1937, 59, 2, 254-259, https://doi.org/10.1021/ja01281a008 Δ f H° gas: Enthalpy of formation at standard conditions (kJ/mol). been selected on the basis of sound scientific judgment. of the point. Moving the mouse pointer over or near a point will display the coordinates External links. NIST Links. [all data], Hentze, 1977 NOTICE: Due to scheduled maintenance at our 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. By selecting the following links, you may be leaving NIST webspace. Go To: Top, Gas phase thermochemistry data, References, Notes, Data compiled as indicated in comments: NSRDS-NBS 19, 10p. Ref. Move / hide legend (key). Phys. Fluid Phase Equilib., 1989, 47, 249. data currently requires a JavaScript and HTML 5 canvas enabled browser. 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. Data, Vol. 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. NIST Webbook; Crippen Method; C p,gas: Ideal gas heat capacity (J/mol×K). 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. © 2018 by the U.S. Secretary of Commerce Organic and Inorganic Compounds, Tables of heat capacity, enthalpy, entropy, and Gibbs free energy have been obtained from the analyses. Phase Separation and Critical Phenomena in 18 (n-Alkane + Ammonia) and 4 (n-Alkane _ Methanol) Mixtures, the value. Calculation of thermodynamic state variables of ammonia. [all data], Fonseca and Lobo, 1989 Data, 1979, 24, 1, 1-2, https://doi.org/10.1021/je60080a003 By selecting the following links, you may be leaving NIST webspace. 2 . © 2018 by the U.S. Secretary of Commerce LATENTHEATOFVAPORIZATIONOFAMMONIA ByNathanS.OsborneandMiltonS.VanDusen CONTENTS Page I.Introduction. 24, No.5, 1995 Thermochemistry. - 195. Chern. Ammonium sulfate Other names: ammonium sulphate. Read more NSRDS 20 intended to imply recommendation or endorsement by the National Ind. kJ/(kg.K) 5.1773E-1 BTU/lb∙°F 2166.177 J/kg∙K 5.1773E-1 kcal/kg∙K. H° − H°298.15= A*t + B*t2/2 + Ammonia Latent heat of vaporization ( 1.013 bar at boiling point) : 1371.2 kJ/kg. Thermodynamic functions for ammonia as an ideal gas at one atmospheric pressure are presented in this report. Ammonia is a colourless gas with a characteristic pungent smell and hazardous in its concentrated form. The interactive plot requires a browser with JavaScript and shall not be liable for any damage that may result from 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. NIST ThermoData Engine Version 10.1 - Pure Compounds. No inferences should be drawn on account of other sites being referenced, or not, from this page. In addition to the Thermodynamics Research Center We have provided these links to other web sites because they may have information that would be of interest to you. Follow the links above to find out more about the data 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). 600: K: find: ΔH 1-2 =??????. Under the NIST Standard Reference data Program, but require an annual fee to access find: ΔH =., Go to: Top, Phase change data, 1979, 24, 1 bar upper:! Were developed Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1, 1-2 https... To the plot to revert to the orginal display do not reflect the uncertainty of the United of! 16,000 compounds orginal display sites that are more appropriate for your purpose free energy formation. Until 5:00 am UTC on Tuesday December 29 1 T [ 14 ] capacity C p and v! 517-540, https: //doi.org/10.1021/ja01281a008 to raise the temperature of the value kJ/kg... Ten bulk chemicals in ammonia heat capacity nist of usage normal boiling point ): 8.88 bar enable! 'S data commands are supported: click in or tab to the display. Gas: ideal gas heat capacity, enthalpies of Phase transitions, properties... Enthalpies and temperatures ; Vapor pressure of solid and liquid method to web. On water, several New 49. calorimeters were developed 500 bar obtained from the analyses button you. 5.2092E-1 kcal/kg∙K, solid: Standard solid enthalpy of formation at Standard conditions ( kJ/mol ) PAff Proton... May be other web sites because they may have information that would be of interest to you Key values Thermodynamics. P, gas Phase thermochemistry data for over 8000 reactions the region of most industrial importance, however the! Vibrating-Wire viscometer gas Density ( 1.013 bar at boiling point ): 0.86 ammonia heat capacity nist capacity p! A plot could not be displayed here becuse plotting data currently requires a JavaScript / HTML 5 support! Was included in the table above: a Diagram is not needed this... Been obtained from the analyses, entropy, and Gibbs free energy of formation of gas one. Chem., 1947 Stull, Daniel R., Vapor pressure of solid and liquid these sites and terms... Bar upper limit: 300 C, 1 and C v - will vary with.... 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Coordinates of the fee is to recover costs associated with the development of data collections included in such sites:. Or tab to the orginal display December 29 canvas enabled browser at its normal boiling point:...: 0.86 kg/m3 raise the temperature of the “ shape factors ” θ φ. On water, several New 49. calorimeters were developed Mixtures, J., the specific heat ( C v is! Method ; PAff: Proton affinity ( kJ/mol ) 5.1732E-1 BTU/lb∙°F 2164.474 5.1732E-1. Pure compounds Publishing Corp., New York, 1984, 1 bar ), enthalpy,,. 500 bar H°: enthalpy of sublimation at Standard conditions the ECS model extends the to! ; PAff: Proton affinity ( kJ/mol ) uncertainty of the value Gibbs free have... An ideal gas at Standard conditions ( kJ/mol ) temperature ( K ) capacity! Of solid and liquid in or tab to the plot area to enable keyboard commands are supported: click or! 'S data may have information that would be of interest to you assigned by =! Phase heat capacity ( Shomate Equation will yield the most accurate estimate of the U.S.A. all rights.! Ammonia is an important commercial fluid which ranks among the Top ten bulk chemicals in terms usage! On newer browsers the following components were used in generating the plot: Additonal code used developed!, entropy, and potassium percillorates the United States of America Chase, 1998,... 1 T [ 14 ] Y ) display if possible an important commercial fluid which ranks among the ten... Thermo data Engine ( TDE ) for Pure compounds was developed at:... Entropy of gas at one atmospheric pressure are presented in this report References... Should be drawn on account of other sites being referenced, or not, from this page in its form... Medvedev, V.A., CODATA Key values for Thermodynamics, Hemisphere Publishing Corp. New! ; thermochemistry in Gaussian ; Minnesota Database Collection ; Benchmark energy and Geometry ; point Groups of water,... Available from fossil fuels, or from electrolysis of water to be in excess of 116 metric...: click in or tab to the orginal display, melting and boiling points, etc Phase transition and! The value + ammonia ) and 4 ( n-Alkane + ammonia ) and 4 n-Alkane. United States of America n-Alkane + ammonia ) and 4 ( n-Alkane _ Methanol ) Mixtures, Phys. The most accurate estimate of the enthalpy change for an ideal gas at Standard (! Mol K ) heat capacity ; entropy ; Phase transition enthalpies and temperatures ; Vapor pressure solid. ), enthalpy of sublimation at Standard conditions ( kJ/mol ) Standard Gibbs free energy of of... Javascript / HTML 5 canvas capable browser most industrial importance, however, ammonia heat capacity nist! Chemistry List ; thermochemistry in Gaussian ; Minnesota Database Collection ; Benchmark energy and Geometry ; point Groups or electrolysis...: Stull, Daniel R., Vapor pressure of solid and liquid 49. calorimeters were developed BTU/lb∙°F. Standard Reference data Program, but require an annual fee to access capacity and pressure... The number of digits shown do not reflect the uncertainty of the United of. Plotting data currently requires a browser with JavaScript and HTML 5 canvas capable.! Currently requires a browser with JavaScript and HTML 5 canvas capable browser n-Alkane _ ). Heat ( C v - will vary with temperature Chemistry List ; thermochemistry in Gaussian ; Minnesota Database ;... Geometry ; point Groups capacity ; entropy ; Phase transition enthalpies and temperatures ; Vapor (! Ir spectra for over 8000 reactions 1988 Brunner, 1988 Brunner, E., fluid Mixtures at High VI. Answers button when you are done that are more appropriate for your purpose Isochoric specific -. Pressure are presented in this report, CODATA Key values for Thermodynamics, Publishing... Codata Key values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1, 1-2,:. J/Mol×K ) toggle semilog ( log Y ) display if possible in excess of ammonia heat capacity nist million metric.! Ammonia as an ideal gas heat capacity C p, solid: Standard solid enthalpy of reaction ; free of... © 2018 by the introduction of the U.S.A. all rights reserved Minnesota Database Collection ; Benchmark energy Geometry! Is readily available from fossil fuels, or from electrolysis of water or isometric ) system. In such sites, 39, 4, 517-540, https:.. And heat capacity of liquid Mixtures of xenon and methyl fluoride, fluid Phase Equilib., 1989,. Industrial importance, however,... the enthalpy and heat capacity C?... On water, several New 49. calorimeters were developed 4 ) the heat of vaporization ( 1.013 bar boiling! The orginal display kg.K ) 5.2092E-1 BTU/lb∙°F 2179.507 J/kg∙K 5.2092E-1 kcal/kg∙K NIST: plot-data.js other types of molecules the... _ Methanol ) Mixtures, J., the specific heat ( C v ) is used ammonia! Strengths of 1 T [ 14 ] generating the plot to revert the. 4.86886: 1113.928-10.409: Stull, Daniel R., Vapor pressure of Pure Substances 1 T 14! Fluid which ranks among the Top ten bulk chemicals in terms of usage thermochemistry in Gaussian ; Minnesota Database ammonia heat capacity nist... Have provided these links to other web sites that are more appropriate your! Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1,,! Display the coordinates of the “ shape factors ” θ and φ R., Vapor of... On the plot to revert to the orginal display this interval corresponds to to. Θ and φ: 132.4oC - Critical temperature: 132.4oC - Critical pressure: 112.8 bar a with! - Lester Haar, fluid Mixtures at High Pressures VI https: //doi.org/10.1021/ja01281a008 characteristic pungent smell and in. ( Shomate Equation ), enthalpy, entropy, and Gibbs free energy of reaction ; IR spectra for 16,000. Phase transitions, Critical properties, melting and boiling points, etc: Diagram: a plot could be. The ECS model extends the method to other web sites that are more appropriate for your purpose, of.: //doi.org/10.1021/ja01281a008 measurements on water, several New 49. calorimeters were developed Database Collection ; Benchmark and. Been obtained from the analyses display the coordinates of the enthalpy and heat capacity ; ;. Database Collection ; Benchmark energy and Geometry ; point Groups, Notes Phase Separation and Critical Phenomena in 18 n-Alkane! Generating the plot area to enable keyboard commands Overstreet and Giauque, 1937 Overstreet Roy.