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Methane

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Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
DRB - D.R. Burgess
ALS - H.Y. Afeefy, J.F. Liebman, and S.E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
Deltafgas-74.87kJ/molReviewChase, 1998Data last reviewed in March, 1961
Deltafgas-74.6 ± 0.3kJ/molReviewManion, 2002adopted recommendation of Gurvich, Veyts, et al., 1991; DRB
Deltafgas-74.5 ± 0.4kJ/molCcbPittam and Pilcher, 1972ALS
Deltafgas-74.85 ± 0.31kJ/molCcbProsen and Rossini, 1945Hf derived from Heat of Hydrogenation; ALS
Deltafgas-73.4 ± 1.1kJ/molCcbRoth and Banse, 1932Reanalyzed by Cox and Pilcher, 1970, Original value = -75.19 kJ/mol; ALS
Quantity Value Units Method Reference Comment
Deltacgas-890.7 ± 0.4kJ/molCcbPittam and Pilcher, 1972Corresponding «DELTA»fgas = -74.48 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacgas-890.35 ± 0.30kJ/molCcbProsen and Rossini, 1945Hf derived from Heat of Hydrogenation; Corresponding «DELTA»fgas = -74.822 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacgas-891.8 ± 1.1kJ/molCcbRoth and Banse, 1932Reanalyzed by Cox and Pilcher, 1970, Original value = -887.3 ± 1.0 kJ/mol; Corresponding «DELTA»fgas = -73.39 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacgas-890.16 ± 0.30kJ/molCmRossini, 1931Corresponding «DELTA»fgas = -75.010 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
gas188.66 ± 0.42J/mol*KN/AColwell J.H., 1963The calorimetric value is significantly higher than the statistically calculated entropy, 186.26 J/mol*K, which remains the best value for use in thermodynamic calculations [ Vogt G.J., 1976, Friend D.G., 1989, Gurvich, Veyts, et al., 1989]. Earlier the value of 185.3 J/mol*K was calculated from experimental data [ Giauque W.F., 1931]. The value of S(298.15 K)=185.94 J/mol*K was obtained by high accuracy ab initio calculation [ East A.L.L., 1997].; GT
Quantity Value Units Method Reference Comment
gas,1 bar186.25J/mol*KReviewChase, 1998Data last reviewed in March, 1961

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
34.92 ± 0.25279.Halford J.O., 1957GT

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
33.28100.Gurvich, Veyts, et al., 1989p=1 bar. Because of more precise method of calculation, the recommended values are more accurate, especially at high temperatures, than those obtained by [ McDowell R.S., 1963] and often regarded as reference data [ Friend D.G., 1989].; GT
33.51200.
35.69298.15
35.76300.
40.63400.
46.63500.
52.74600.
58.60700.
64.08800.
69.14900.
73.751000.
77.921100.
81.681200.
85.071300.
88.111400.
90.861500.
93.331600.
95.581700.
97.631800.
99.511900.
101.242000.
102.832100.
104.312200.
105.702300.
107.002400.
108.232500.
109.392600.
110.502700.
111.562800.
112.572900.
113.553000.

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. - 1300.1300. - 6000.
A -0.70302985.81217
B 108.477311.26467
C -42.52157-2.114146
D 5.8627880.138190
E 0.678565-26.42221
F -76.84376-153.5327
G 158.7163224.4143
H -74.87310-74.87310
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in March, 1961 Data last reviewed in March, 1961

References

Go To: Top, Gas phase thermochemistry data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Manion, 2002
Manion, J.A., Evaluated Enthalpies of Formation of the Stable Closed Shell C1 and C2 Chlorinated Hydrocarbons, J. Phys. Chem. Ref. Data, 2002, 31, 1, 123-172, https://doi.org/10.1063/1.1420703 . [all data]

Gurvich, Veyts, et al., 1991
Thermodynamic Properties of Individual Substances, 4th edition, Volume 2, Gurvich, L.V.; Veyts, I.V.; Alcock, C.B.;, ed(s)., Hemisphere, New York, 1991. [all data]

Pittam and Pilcher, 1972
Pittam, D.A.; Pilcher, G., Measurements of heats of combustion by flame calorimetry. Part 8.-Methane, ethane, propane, n-butane and 2-methylpropane, J. Chem. Soc. Faraday Trans. 1, 1972, 68, 2224-2229. [all data]

Prosen and Rossini, 1945
Prosen, E.J.; Rossini, F.D., Heats of combustion and formation of the paraffin hydrocarbons at 25° C, J. Res. NBS, 1945, 263-267. [all data]

Roth and Banse, 1932
Roth, W.A.; Banse, H., Die verbrennungs- und bildungswarme von kohlenoxyd und methan, Arch. Eisenhutten., 1932, 6, 43-46. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Rossini, 1931
Rossini, F.D., The heats of combustion of methane and carbon monoxide, J. Res. NBS, 1931, 6, 37-49. [all data]

Colwell J.H., 1963
Colwell J.H., Thermodynamic properties of CH4 and CD4. Interpretation of the properties of solid, J. Chem. Phys., 1963, 39, 635-653. [all data]

Vogt G.J., 1976
Vogt G.J., Entropy and heat capacity of methane; spin-species conversion, J. Chem. Thermodyn., 1976, 8, 1011-1031. [all data]

Friend D.G., 1989
Friend D.G., Thermophysical properties of methane, J. Phys. Chem. Ref. Data, 1989, 18, 583-638. [all data]

Gurvich, Veyts, et al., 1989
Gurvich, L.V.; Veyts, I.V.; Alcock, C.B., Thermodynamic Properties of Individual Substances, 4th ed.; Vols. 1 and 2, Hemisphere, New York, 1989. [all data]

Giauque W.F., 1931
Giauque W.F., The entropies of methane and ammonia, Phys. Rev., 1931, 38, 196-197. [all data]

East A.L.L., 1997
East A.L.L., Ab initio statistical thermodynamical models for the computation of third-law entropies, J. Chem. Phys., 1997, 106, 6655-6674. [all data]

Halford J.O., 1957
Halford J.O., Standard heat capacities of gaseous methanol, ethanol, methane and ethane at 279 K by thermal conductivity, J. Phys. Chem., 1957, 61, 1536-1539. [all data]

McDowell R.S., 1963
McDowell R.S., Thermodynamic functions of methane, J. Chem. Eng. Data, 1963, 8, 547-548. [all data]


Notes

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