Methane

Formula: CH₄
Molecular weight: 16.0425
IUPAC Standard InChI: InChI=1S/CH4/h1H4
IUPAC Standard InChIKey: VNWKTOKETHGBQD-UHFFFAOYSA-N
CAS Registry Number: 74-82-8
Chemical structure:
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Other names: Marsh gas; Methyl hydride; CH4; Fire Damp; R 50; Biogas; R 50 (refrigerant)
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Critical temperature

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Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director

T_c (K)	Reference	Comment
190.564 ± 0.015	Ambrose and Tsonopoulos, 1995
190.55	Friend, Ely, et al., 1989	Uncertainty assigned by TRC = 0.01 K; TRC
190.58	Teja, Lee, et al., 1989	TRC
190.53	Younglove and Ely, 1987	Uncertainty assigned by TRC = 0.05 K; TRC
190.55	Kleinrahm and Wagner, 1986	Uncertainty assigned by TRC = 0.01 K; Tc from orthobaric density curve. PRT, IPTS-68,; TRC
190.6	Majer and Svoboda, 1985
190.78	Sychev, Vasserman, et al., 1979	Uncertainty assigned by TRC = 0.4 K; TRC
190.55	Angus, Armstrong, et al., 1978	Uncertainty assigned by TRC = 0.05 K; TRC
190.55	Goodwin, 1974	TRC
190.53	Prydz and Goodwin, 1972	Uncertainty assigned by TRC = 0.0019 K; TRC
190.78	Vennix, Leland, et al., 1970	Uncertainty assigned by TRC = 0.4 K; TRC
190.57	Ricci and Scafe, 1969	Uncertainty assigned by TRC = 0.1 K; TRC
190.6	Grigor and Steele, 1968	Uncertainty assigned by TRC = 0.15 K; TRC
190.3	Jones and Rowlinson, 1963	Uncertainty assigned by TRC = 0.4 K; TRC
190.59	Bloomer and Parent, 1952	Uncertainty assigned by TRC = 0.4 K; TRC
190.7	Bennewitz and Andreewa, 1929	Uncertainty assigned by TRC = 0.4 K; TRC
191.07	Keyes, Taylor, et al., 1922	Uncertainty assigned by TRC = 0.6 K; TRC
190.3	Cardoso, 1915	Uncertainty assigned by TRC = 0.5 K; TRC
190.30	Cardoso, 1915, 2	Uncertainty assigned by TRC = 0.6 K; TRC
191.4	Olszewski, 1895	Uncertainty assigned by TRC = 1. K; TRC; Data excluded from overall average
173.7	Dewar, 1884	Uncertainty assigned by TRC = 20. K; TRC; Data excluded from overall average
199.7	Von Wroblewski, 1884	Uncertainty assigned by TRC = 10. K; TRC; Data excluded from overall average
197.5	Sarrau, 1882	Uncertainty assigned by TRC = 7. K; TRC; Data excluded from overall average

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:

References

Go To: Top, Critical temperature, Notes

Ambrose and Tsonopoulos, 1995
Ambrose, D.; Tsonopoulos, C., Vapor-Liquid Critical Properties of Elements and Compounds. 2. Normal Alkenes, J. Chem. Eng. Data, 1995, 40, 531-546. [all data]

Friend, Ely, et al., 1989
Friend, D.G.; Ely, J.F.; Ingham, H., Thermophysical Properties of Methane, J. Phys. Chem. Ref. Data, 1989, 18, 2, 583-638, https://doi.org/10.1063/1.555828 . [all data]

Teja, Lee, et al., 1989
Teja, A.S.; Lee, R.J.; Rosenthal, D.J.; Anselme, M.J., Correlation of the Critical Properties of Alkanes and Alkanols in 5th IUPAC Conference on Alkanes and AlkanolsGradisca, 1989. [all data]

Younglove and Ely, 1987
Younglove, B.A.; Ely, J.F., Thermophysical Properties of Fluids II. Methane, Ethane, Propane, Isobutane, and Normal Butane, J. Phys. Chem. Ref. Data, 1987, 16, 577. [all data]

Kleinrahm and Wagner, 1986
Kleinrahm, R.; Wagner, W., Measurement and correlation of the equilibrium liquid and vapour densities & the vapour pres. along the coexistence curve of methane, J. Chem. Thermodyn., 1986, 18, 739-60. [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Sychev, Vasserman, et al., 1979
Sychev, V.V.; Vasserman, A.A.; Zagoruchenko, V.A.; Kozlov, A.D.; Spiridonov, G.A.; Tsymarny, V.A., Thermodynamic Properties of Methane, 1979. [all data]

Angus, Armstrong, et al., 1978
Angus, S.; Armstrong, B.; de Reuck, K.M., International Thermodynamic Tables of the Fluid State - 5 Methane, Pergamon, Oxford, 1978. [all data]

Goodwin, 1974
Goodwin, R.D., The Thermodynamic Properties of Methane, from 90 to 500K at Pressures to 700 Bar, NBS Tech. Note (U. S.) No. 653, 1974. [all data]

Prydz and Goodwin, 1972
Prydz, R.; Goodwin, R.D., Experimental Melting and Vapor Pressures of Methane, J. Chem. Thermodyn., 1972, 4, 127-33. [all data]

Vennix, Leland, et al., 1970
Vennix, A.J.; Leland, T.W.; Kobayashi, R., Low-temperature volumetric properties of methane, J. Chem. Eng. Data, 1970, 15, 238-243. [all data]

Ricci and Scafe, 1969
Ricci, F.P.; Scafe, E., Orthobaric Density of CH4 in the Critical Region, Phys. Lett. A, 1969, 29, 650-1. [all data]

Grigor and Steele, 1968
Grigor, A.F.; Steele, W.A., Physical properties of fluid ch(4) and cd(4): experimental, J. Chem. Phys., 1968, 48, 1032-1037. [all data]

Jones and Rowlinson, 1963
Jones, I.W.; Rowlinson, J.S., Gas-Liquid Critical Temperatures of Binary Mixtures. Part 2., Trans. Faraday Soc., 1963, 59, 1702-8. [all data]

Bloomer and Parent, 1952
Bloomer, O.T.; Parent, J.D., Physical-chemical properties of methane + nitrogen mixtures, Inst. Gas Technol., Chicago, Res. Bull., 1952, No. 17. [all data]

Bennewitz and Andreewa, 1929
Bennewitz, K.; Andreewa, N., Investigations in the Critical Region III. Energy Measurements by Means of the Joule-Effect, Z. Phys. Chem., Abt. A, 1929, 142, 37. [all data]

Keyes, Taylor, et al., 1922
Keyes, F.G.; Taylor, R.S.; Smith, L.B., The thermodynamic properties of methane, J. Math. Phys. (Cambridge, Mass.), 1922, 1, 211-42. [all data]

Cardoso, 1915
Cardoso, E., Study of the Critical Point of Several Difficultly LIquifiable Gases: Nitrogen, Carbon Monoxide, Oxygen and Methane, J. Chim. Phys. Phys.-Chim. Biol., 1915, 13, 312. [all data]

Cardoso, 1915, 2
Cardoso, E., Experimental determination of the critical constants of oxygen, nitrogen, carbon monoxide and methane., Arch. Sci. Phys. Nat., 1915, 39, 400. [all data]

Olszewski, 1895
Olszewski, K., On the liquefaction of gases, Philos. Mag., 1895, 39, 188. [all data]

Dewar, 1884
Dewar, J., On the Liquefaction of Oxygen and the Critical Volumes of Fluids, Philos. Mag., 1884, 18, 210-6. [all data]

Von Wroblewski, 1884
Von Wroblewski, S., C. R. Hebd. Seances Acad. Sci., 1884, 99, 136-7. [all data]

Sarrau, 1882
Sarrau, E., C. R. Hebd. Seances Acad. Sci., 1882, 94, 718. [all data]

Notes

Go To: Top, Critical temperature, References

Symbols used in this document:

T_c Critical temperature
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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