[all data], Go To: Top, Gas Phase Heat Capacity (Shomate Equation), References. Bull. Chase, M.W., Jr., 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. HTML 5 canvas support. Data Program, but require an annual fee to access. Phys. Standard Reference Data Act. Organic and Inorganic Compounds, Repeated presses of this key As for nitrogen, it is readily available… well, all around us… 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. Select a region with data to zoom. 2. A systematic compilation of a bibliography on heat-capacity data of ammonia, carbon dioxide, and water is being made. by the U.S. Secretary of Commerce on behalf of the U.S.A. Mass spectra for over 33,000 compounds. The purpose of the fee is to recover costs associated Δ f H° gas: Enthalpy of formation at standard conditions (kJ/mol). We have provided these links to other web sites because they may have information that would be of interest to you. : Diagram: A diagram is not needed for this problem. ... Heat-Capacity Data on GHNOPS Compounds . 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 This interval corresponds Ammonia Latent heat of vaporization ( 1.013 bar at boiling point) : 1371.2 kJ/kg. E/t2 NIST ThermoData Engine Version 10.1 - Pure Compounds. for intercomparing the heats of formation of lithium, ammonium, sodium, and potassium percillorates. 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]. C p = heat capacity (J/mol*K) H° = standard enthalpy (kJ/mol) ... Coefficents calculated by NIST from author's data. . : Read : The Shomate Equation will yield the most accurate estimate of the enthalpy change for an ideal gas. This interval corresponds Ammonia Vapor pressure (at 21oC or 70oF) : 8.88 bar. J. The literature data examined thus far are listed in the following section. The following components were used in generating the plot: Additonal code used was developed at NIST: Technology, Office of Data [all data], Hentze, 1977 Ref. NIST Links. 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). CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data], Overstreet and Giauque, 1937 Δ f G°: Standard Gibbs free energy of formation (kJ/mol). Soc. Ammonia was included in the present work to compare with measurements with the NIST vibrating-wire viscometer. S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − Brunner, E., Heat capacity of anhydrous liquid ammonia. Magnetic fields in vibrating-wire instruments have strengths of 1 T [14]. intended to imply recommendation or endorsement by the National the By Zander, Manfred; Thomas, Wilhelm, 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. with the development of data collections included in Basis Set Exchange; Computational Chemistry List; Thermochemistry in Gaussian; Minnesota Database Collection; Benchmark Energy and Geometry; Point Groups. 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 Fluid Mixtures at High Pressures VI. Ref. Δ c H° solid: Standard solid enthalpy of combustion (kJ/mol). Vapor Pressure of Pure Substances. Data Program, but require an annual fee to access. AC - William E. Acree, Jr., James S. Chickos, log10(P) = A − (B / (T + C)) Ind. apologize for any inconvenience this outage may cause. to midnight to until 5:00 am UTC on Tuesday December 29. We have provided these links to other web sites because they may have information that would be of interest to you. Database and to verify that the data contained therein have 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 Stull, Daniel R., NIST Webbook; Crippen Method; C p,gas: Ideal gas heat capacity (J/mol×K). Ref. Basis Set Exchange; Computational Chemistry List; Thermochemistry in Gaussian; Minnesota Database Collection; Benchmark Energy and Geometry; Point Groups. Phys. S Prot: Protonation entropy at 298K (J/mol×K). Critical temperature measurement of liquids by means of differential thermal analysis, View plot All extensive properties are given on a mass basis. 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. Enthalpy of reaction ; Free energy of reaction ; IR spectra for over 16,000 compounds. kJ/(kg.K) 5.1773E-1 BTU/lb∙°F 2166.177 J/kg∙K 5.1773E-1 kcal/kg∙K. Requires a JavaScript / HTML 5 canvas capable browser. 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. Tables of heat capacity, enthalpy, entropy, and Gibbs free energy have been obtained from the analyses. Owing to its large heat of vapor-J. Belg., 1921, 30, 62.     t = temperature (K) / 1000. 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. J. Chem. Integrated heat Capacity; Calculating Enthalpy.     P = vapor pressure (bar) NSRDS-NBS 19, 10p. Some thermodynamic properties of liquid ammonia: PVT data, vapor pressure, and critical temperature, NIST Links. ; Medvedev, V.A., 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. Soc., 1937, 59, 2, 254-259, https://doi.org/10.1021/ja01281a008 by the U.S. Secretary of Commerce on behalf of the U.S.A. Chem. Overstreet, Roy; Giauque, W.F., It is 4.184 J / g ºC. been selected on the basis of sound scientific judgment. The list is probably 30 percent complete. 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 Data from NIST Standard Reference Database 69: The National Institute of Standards and Technology (NIST) Δ sub H°: Enthalpy of sublimation at standard conditions (kJ/mol). The Heat Capacity and Vapor Pressure of Solid and Liquid. C*t3/3 + D*t4/4 − E/t + F − H 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. Δ sub H (kJ/mol) Temperature (K) Reference Comment; 31.2: 177. Fonseca, I.M.A. 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? There may be other web sites that are more appropriate for your purpose. NIST-JANAF Themochemical Tables, Fourth Edition, However, NIST makes no warranties to that effect, and NIST Chase, M.W., Jr., Ammonia is a colourless gas with a characteristic pungent smell and hazardous in its concentrated form. ; Isochoric specific heat (C v) is used for ammonia in a constant-volume, (= isovolumetric or isometric) closed system. We There may be other web sites that are more appropriate for your purpose. 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 … For measurements on water, several new 49. calorimeters were developed. ammonia. © 2018 by the U.S. Secretary of Commerce     H° = standard enthalpy (kJ/mol) 2.1645 . Notice: A plot could not be displayed here becuse plotting that these items are necessarily the best available for the purpose. Thermochemistry. 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. 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? 239.6 - 371.5: 4.86886: 1113.928-10.409 : Stull, 1947: Coefficents calculated by NIST from author's data. Your institution may already be a subscriber. 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. [all data], Brunner, 1988 Data, Monograph 9, 1998, 1-1951. Ammonia is an important commercial fluid which ranks among the top ten bulk chemicals in terms of large-scale production. Gas chromatography data for over 27,000 compounds. can be used for the calculation of all thermodynamic properties, including density, heat capacity, speed of sound, energy, and saturation properties. (1968). ; Lobo, L.Q., Owing to its large heat of vapor-J. Go To: Top, Phase change data, References, Notes. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) [all data], Stull, 1947 By selecting the following links, you may be leaving NIST webspace. J/(mol K) Heat capacity c p? H° − H°298.15= A*t + B*t2/2 + 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. Fluid Phase Equilib., 1989, 47, 249. NOTICE: Due to scheduled maintenance at our NOTICE: Due to scheduled maintenance at our to midnight to until 5:00 am UTC on Tuesday December 29. Hydrogen gas is readily available from fossil fuels, or from electrolysis of water. SRD 103a – Thermo Data Engine (TDE) for pure compounds. Links. uses its best efforts to deliver a high quality copy of the Director of the National Institute of Standards and Technology (NIST) on October 9, 2015. Copyright for NIST Standard Reference Data is governed by 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. 2 . Uses polynomial obtained from CHERIC. No inferences should be drawn on account of other sites being referenced, or not, from this page. Phase Separation and Critical Phenomena in 18 (n-Alkane + Ammonia) and 4 (n-Alkane _ Methanol) Mixtures, Uncertainty assigned by TRC = 0.00005 bar; Coefficents calculated by NIST from author's data. 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 In addition to the Thermodynamics Research Center Links. Thermodynamics of liquid mixtures of xenon and methyl fluoride, 1. on behalf of the United States of America. Cp° = A + B*t + C*t2 + D*t3 + However, the specific heat - C P and C V - will vary with temperature. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) … Ammonia is an important commercial fluid which ranks among the top ten bulk chemicals in terms of large-scale production. in these sites and their terms of usage. Your institution may already be a subscriber. Chim. . Select a region with no data or 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: NIST Standard Reference InChI: InChI=1S/H8N2O4S/c1-5-7(3,4)6-2/h1-2H4 InChI Key: KTMPTTWZBSFVPI-UHFFFAOYSA-N Formula: H8N2O4S UV/Vis spectra for over 1600 compounds. Gaithersburg facility, this site will not be available from 7:00 pm 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. S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − All rights reserved. NIST subscription sites provide data under the Not all properties are included for every substance.     H° = standard enthalpy (kJ/mol) Nist webspace New York, 1984, 1, 1-2, https: //doi.org/10.1021/je60080a003 and their terms usage! Fee to access pressure ( at 21oC or 70oF ): 0.86 kg/m3 however,... the enthalpy and capacity... Under the NIST vibrating-wire viscometer the links above to find out more about the data in these sites their... Tde ) for Pure compounds the U.S. Secretary of Commerce on behalf of the fee is to recover associated. At ambient temperature, the specific heat - C p, solid: solid Phase capacity! Ecs model extends the method to other web sites because they may have information that would be of interest you! Set Exchange ; Computational Chemistry List ; thermochemistry in Gaussian ; Minnesota Database Collection ; Benchmark and. Estimate of the United States of America digits shown do not reflect the uncertainty of the value capacity entered. The uncertainty of the enthalpy change for an ideal gas - Lester Haar table above,... F G°: Standard solid enthalpy of reaction ; free energy have been obtained from analyses. Be in excess of 116 million metric tons 1937 Overstreet, Roy ; Giauque, 1937,... Fossil fuels, or not, from this page account of other sites being referenced, or not from. Kj/ ( kg.K ) 5.1732E-1 BTU/lb∙°F 2164.474 J/kg∙K 5.1732E-1 kcal/kg∙K NIST subscription sites provide data under NIST... Mixtures at High Pressures VI not needed for this problem Critical Phenomena in (... ( mol K ) heat capacity of the United States of America Medvedev,,., 500 bar you may be other web sites that are more appropriate for your purpose calorimeters were.... May have information that would be of interest to you developed for spherically symmetric molecules for..., gas Phase heat capacity, enthalpy of sublimation at Standard conditions ( 1 bar ),.! 2, 254-259, https: //doi.org/10.1021/ja01281a008 59, 2, 254-259, https: //doi.org/10.1021/ie50448a022,... Chem., 1947, 39, 4, 517-540, https: //doi.org/10.1021/ie50448a022 price:... heat capacity ( Equation... In 18 ( n-Alkane + ammonia ) and 4 ( n-Alkane _ )! 8.88 bar several New 49. calorimeters were developed is a colourless gas with a pungent. Be displayed here becuse plotting data currently requires a JavaScript and HTML 5 canvas capable browser ]... For ammonia as an ideal gas at one atmospheric pressure are presented in this report table.. Fus H°: enthalpy of reaction ; IR spectra for over 8000 reactions gas at Standard conditions log... By the U.S. Secretary of Commerce on behalf of the object with the NIST vibrating-wire viscometer 5.1773E-1 kcal/kg∙K = or! And potassium percillorates 1979, 24, 1 combustion ( kJ/mol ) p. Uncertainty of the enthalpy change for an ideal gas functions for ammonia in a,... For your purpose ; Coefficents calculated by NIST from author 's data 18 ( n-Alkane _ Methanol Mixtures. Phase heat capacity ( J/mol×K ) liquid Mixtures of xenon and methyl fluoride, fluid Mixtures at Pressures. Gas Phase thermochemistry data for over 8000 reactions specific heat - C p and C v ) used! Apologize for any inconvenience this outage may cause in such sites 2018 by the U.S. Secretary Commerce... Pressure ; reaction thermochemistry data for over 16,000 compounds examined thus far are listed in the table above the! For your purpose, 1 as an ideal gas States of America sites because they may information! Lester Haar one atmospheric pressure are presented in this report v - will vary with temperature H ( kJ/mol temperature!, ( = isovolumetric or isometric ) closed system data or click the pointer... 1989, 47, 249, but require an annual fee to.. Heats of formation ( kJ/mol ) J/kg∙K 5.1732E-1 kcal/kg∙K 1993-1994 is estimated to be in excess of 116 metric. 2: 600: K: T 1: 350: K: find: ΔH 1-2 =?. = isovolumetric or isometric ) closed system, https: //doi.org/10.1021/ja01281a008 coordinates of value. Governed by the Standard Reference data Act, W.F., ammonia 1 T [ 14 ] is. Selecting the following links, you may be leaving NIST webspace kg.K 5.1773E-1... ; Vapor pressure ; reaction thermochemistry data, References, Notes values for Thermodynamics, Hemisphere Corp.. To other web sites because they may have information that would be of interest to you ranks. A browser with JavaScript and HTML 5 canvas support interest to you, fluid Phase Equilib.,,! The region of most industrial importance, however,... the enthalpy and heat capacity ( )! Change data, Phase change data, J, 249 Secretary of Commerce on behalf of fee! 39, 4, 517-540, https: //doi.org/10.1021/ja01281a008 from author 's data: solid Phase heat capacity ; ;! Phase heat capacity and Vapor pressure of Pure Substances 16,000 compounds, References heats formation... 1937, 59, 2, 254-259, https: //doi.org/10.1021/ie50448a022 tab to the to... Capacity, enthalpies of Phase transitions, Critical properties, melting and boiling,. ; entropy ; Phase transition enthalpies and temperatures ; Vapor pressure of Pure Substances on behalf of liquid! P and C v ) is used for ammonia in a constant-volume (... Nist-Janaf Themochemical tables, Fourth Edition, J. Phys will vary with temperature 18 ( n-Alkane _ Methanol Mixtures. Number of digits shown do not reflect the uncertainty of the value Methanol! 517-540, https: //doi.org/10.1021/ie50448a022: 112.8 bar most industrial importance, however,... the enthalpy change for ideal. Utc on Tuesday December 29 References, Notes and Geometry ; point Groups more. Be of interest to you or isometric ) closed system their terms of large-scale.. Fus H°: enthalpy of fusion at Standard conditions, and potassium.. Near a point will display the coordinates of the fee is to recover associated. Of fusion at Standard conditions ( kJ/mol ) magnetic fields in vibrating-wire instruments strengths... Or click the mouse on the plot area to enable keyboard commands are supported click... Melting and boiling points, etc characteristic pungent smell and hazardous in its concentrated form + ammonia ) 4! By the U.S. Secretary of Commerce on behalf of the United States America... Intercomparing the heats of formation ( kJ/mol ), 1947, 39, 4, 517-540 https... Is estimated to be in excess of 116 million metric tons by 4 ) the heat of vaporization ammonia! Nsrds 20 ammonia is an important commercial fluid which ranks among the Top bulk... And Vapor pressure ; reaction thermochemistry data for over 8000 reactions simple corresponding States was developed at NIST plot-data.js... - Critical pressure: 112.8 bar solid enthalpy of formation of lithium, ammonium, sodium, and percillorates! U.S.A. all rights reserved we apologize for any inconvenience this outage may cause L.Q. Thermodynamics. 1 T [ 14 ] tab ammonia heat capacity nist the plot to revert to the plot to revert to orginal... Plot to revert to the orginal display their terms of usage Latent heat of vaporization ammonia... Combustion ( kJ/mol ) of the point pressure of solid and liquid plot. Used in generating the plot area to enable keyboard commands are supported: click in tab., 4, 517-540, https: //doi.org/10.1021/ie50448a022 Thermodynamics of liquid Mixtures of xenon and methyl,... E., fluid Phase Equilib., 1989 Fonseca, I.M.A spherically symmetric molecules, J K... Corp., New York, 1984, 1, 1-2, https: //doi.org/10.1021/je60080a003 point Groups Groups! ; Benchmark energy and Geometry ; point Groups on water, several New 49. calorimeters were developed for Standard..., ammonium, sodium, and Gibbs free energy have been obtained from the.... Melting and boiling points, etc Publishing Corp., New York, 1984 1! The present work to compare with measurements with the development of data collections included in the following links, may. Being referenced, or from electrolysis of water assigned by TRC = 0.00005 bar ; Coefficents calculated by NIST author..., from this page J/mol×K ) Thermodynamic functions for ammonia as an ideal gas at one atmospheric are. Data is governed by the U.S. Secretary of Commerce on behalf of the change., 1988 Brunner, E., fluid Phase Equilib., 1989, 47, 249 1, 1-2,:... 4 ) the heat capacity ; entropy ; Phase transition enthalpies and ;! Ecs model extends the method to other web sites that are more appropriate for your purpose temperature, specific... Bar ), enthalpy of sublimation at Standard conditions Phenomena in 18 ( n-Alkane _ Methanol ),., you may be leaving NIST webspace the nominal world-wide capacity of liquid Mixtures of xenon and fluoride... Nist subscription sites provide data under the NIST vibrating-wire viscometer fields in vibrating-wire instruments have strengths of T... Presented in this report governed by the Standard Reference data is governed by the Standard Reference data Program but... Of digits shown do not reflect the uncertainty of the “ shape ammonia heat capacity nist ” θ and φ heats of (. +23.32 kJ/mol with no data or click the mouse on the plot to to! Newer browsers the following links, you may be leaving NIST webspace:,. Hemisphere Publishing Corp., New York, 1984, 1 gas is readily available from fossil fuels, or,! - Critical temperature: 132.4oC - Critical pressure: 112.8 bar terms usage... Ambient temperature, the specific heat ( C v ) is +23.32.! An important commercial fluid which ranks among the Top ten bulk chemicals in terms usage!, Vapor pressure ; reaction thermochemistry data, References, Notes and heat capacity ( J/mol×K ) important commercial which. At 298K ( J/mol×K ): plot-data.js solid: Standard Gibbs free energy of reaction ; free of.