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:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Marsh gas; Methyl hydride; CH4; Fire Damp; R 50; Biogas; R 50 (refrigerant)
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Critical pressure
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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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
| Pc (bar) | Reference | Comment |
|---|---|---|
| 45.99 ± 0.03 | Ambrose and Tsonopoulos, 1995 | |
| 45.95 | Brunner, 1990 | Uncertainty assigned by TRC = 0.10 bar; TRC |
| 45.992 | Friend, Ely, et al., 1989 | Uncertainty assigned by TRC = 0.03 bar; TRC |
| 46.04 | Teja, Lee, et al., 1989 | TRC |
| 45.9797 | Younglove and Ely, 1987 | Uncertainty assigned by TRC = 0.001 bar; TRC |
| 43.992 | Kleinrahm and Wagner, 1986 | Uncertainty assigned by TRC = 0.02 bar; Vapour pressure measurement, differential pressure indicator and PB or quartz Bourdon gauge; TRC; Data excluded from overall average |
| 46.20 | Sychev, Vasserman, et al., 1979 | Uncertainty assigned by TRC = 0.40 bar; TRC |
| 45.95 | Angus, Armstrong, et al., 1978 | Uncertainty assigned by TRC = 0.02 bar; TRC |
| 45.9883 | Goodwin, 1974 | TRC |
| 45.957 | Prydz and Goodwin, 1972 | Uncertainty assigned by TRC = 0.0045 bar; TRC |
| 46.26 | Vennix, Leland, et al., 1970 | Uncertainty assigned by TRC = 0.3447 bar; TRC |
| 46.20 | Grigor and Steele, 1968 | Uncertainty assigned by TRC = 0.1519 bar; TRC |
| 46.08 | Bloomer and Parent, 1952 | Uncertainty assigned by TRC = 0.3447 bar; TRC |
| 46.30 | Bennewitz and Andreewa, 1929 | Uncertainty assigned by TRC = 1.0133 bar; TRC |
| 46.40 | Keyes, Taylor, et al., 1922 | Uncertainty assigned by TRC = 1.0133 bar; TRC |
| 46.2042 | Cardoso, 1915 | Uncertainty assigned by TRC = 0.3039 bar; TRC |
| 46.20 | Cardoso, 1915, 2 | Uncertainty assigned by TRC = 0.4053 bar; TRC |
| 55.60 | Olszewski, 1895 | Uncertainty assigned by TRC = 10.132 bar; TRC; Data excluded from overall average |
| 50.70 | Dewar, 1884 | Uncertainty assigned by TRC = 4.053 bar; TRC; Data excluded from overall average |
| 57.60 | Von Wroblewski, 1884 | Uncertainty assigned by TRC = 10.132 bar; TRC; Data excluded from overall average |
| 47.40 | Sarrau, 1882 | Uncertainty assigned by TRC = 2.0265 bar; TRC; Data excluded from overall average |
References
Go To: Top, Critical pressure, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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]
Brunner, 1990
Brunner, E.,
Fluid Mixtures at High Pressures. 9. Phase Separation and Critical Phenomena in 23 (n-Alkane + Water) Mixtures.,
J. Chem. Thermodyn., 1990, 22, 335. [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]
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]
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]
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 pressure, References
- Symbols used in this document:
Pc Critical pressure - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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