Methane
- Formula: CH4
- Molecular weight: 16.0425
- 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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Reaction thermochemistry data
Go To: Top, References, Notes
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:
MS - José A. Martinho Simões
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
RCD - Robert C. Dunbar
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Reactions 101 to 112
C11H13ClTi (cr) + ( • 4.40
) (solution) =
(cr) +
(g)
By formula: C11H13ClTi (cr) + (HCl • 4.40H2O) (solution) = C10H10Cl2Ti (cr) + CH4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -68.9 ± 3.1 | kJ/mol | RSC | Calhorda, Dias, et al., 1987 | MS |
By formula: H2 + 2CH3Br = 2CH4 + Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -28. ± 3. | kJ/mol | Chyd | Adams, Carson, et al., 1966 | liquid phase; ALS |
By formula: H2 + CH3Br = HBr + CH4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -73.6 ± 1.4 | kJ/mol | Chyd | Fowell, Lacher, et al., 1965 | gas phase; ALS |
By formula: H2 + CH3Cl = CH4 + HCl
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -80.8 ± 0.4 | kJ/mol | Chyd | Lacher, Emery, et al., 1956 | gas phase; ALS |
By formula: CF4 + 4HF = CH4 + 4F2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -1922. ± 13. | kJ/mol | Cm | Jessup, McCoskey, et al., 1955 | gas phase; ALS |
By formula: CH4 + Br2 = HBr + CH3Br
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -26.4 ± 0.7 | kJ/mol | Eqk | Ferguson, Okafo, et al., 1973 | gas phase; ALS |
C5H15Ta (l) + 2.5 (l) = 0.5O5Ta2 (cr) + 5
(g)
By formula: C5H15Ta (l) + 2.5H2O (l) = 0.5O5Ta2 (cr) + 5CH4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -853. ± 26. | kJ/mol | RSC | Adedeji, Connor J.A., et al., 1976 | MS |
By formula: (Mg+ • CH4) + CH4 = (Mg+ • 2CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 15. ± 6.7 | kJ/mol | CIDT | Andersen, Muntean, et al., 2000 | RCD |
By formula: CH4 + CH2I2 = 2CH3I
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -20. ± 4.2 | kJ/mol | Eqk | Furuyama, Golden, et al., 1968 | gas phase; ALS |
C6H4CrO5 (g) = C5CrO5 (g) + (g)
By formula: C6H4CrO5 (g) = C5CrO5 (g) + CH4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 33.5 ± 8.4 | kJ/mol | KG/EST | Wells, House, et al., 1994 | MS |
By formula: Mg+ + CH4 = (Mg+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 28. ± 6.7 | kJ/mol | CIDT | Andersen, Muntean, et al., 2000 | RCD |
By formula: CH3Li (g) = Li (g) + CH4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 276. | kJ/mol | N/A | Smith and Patrick, 1983 | MS |
References
Go To: Top, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Calhorda, Dias, et al., 1987
Calhorda, M.J.; Dias, A.R.; Minas da Piedade M.E.; Salema, M.S.; Martinho Simões J.A.,
Organometallics, 1987, 6, 734. [all data]
Adams, Carson, et al., 1966
Adams, G.P.; Carson, A.S.; Laye, P.G.,
Thermochemistry of reductions caused by lithium aluminium hydride. Part 4.-Heat of formation of methyl bromide,
Trans. Faraday Soc., 1966, 62, 1447-1449. [all data]
Fowell, Lacher, et al., 1965
Fowell, P.; Lacher, J.R.; Park, J.D.,
Reaction heats of organic compounds. Part 3.-Heats of hydrogenation of methyl bromide and ethyl bromide,
Trans. Faraday Soc., 1965, 61, 1324-1327. [all data]
Lacher, Emery, et al., 1956
Lacher, J.R.; Emery, E.; Bohmfalk, E.; Park, J.D.,
Reaction heats of organic compounds. IV. A high temperature calorimeter and the hydrogenation of methyl ethyl and vinyl chlorides,
J. Phys. Chem., 1956, 60, 492-495. [all data]
Jessup, McCoskey, et al., 1955
Jessup, R.S.; McCoskey, R.E.; Nelson, R.A.,
The heat of formation of tetrafluoromethane,
J. Am. Chem. Soc., 1955, 77, 244-245. [all data]
Ferguson, Okafo, et al., 1973
Ferguson, K.C.; Okafo, E.N.; Whittle, E.,
Bond dissociation energies from equilibrium studies Part 4.-The equilibrium Br2 + CH4 = HBr + CH3Br. Determination of D(CH3-Br) and ΔHf°(CH3Br,g),
J. Chem. Soc. Faraday Trans. 1, 1973, 69, 295-301. [all data]
Adedeji, Connor J.A., et al., 1976
Adedeji, F.A.; Connor J.A.; Skinner, H.A.; Galyer, L.; Wilkinson, G.,
J. Chem. Soc., Chem. Commun., 1976, 159.. [all data]
Andersen, Muntean, et al., 2000
Andersen, A.; Muntean, F.; Walter, D.; Rue, C.; Armentrout, P.B.,
Collision-Induced Dissociation and Theoretical Studies of Mg+ Complexes with CO, CO2, NH3, CH4, CH3OH, and C6H6,
J. Phys. Chem. A, 2000, 104, 4, 692, https://doi.org/10.1021/jp993031t
. [all data]
Furuyama, Golden, et al., 1968
Furuyama, S.; Golden, D.M.; Benson, S.W.,
The thermochemistry of the gas-phase equilibrium 2CH3I = CH4 + CH2i2. The heat of formation of CH2I2,
J. Phys. Chem., 1968, 72, 4713-4715. [all data]
Wells, House, et al., 1994
Wells, J.R.; House, P.G.; Weitz, E.,
J. Phys. Chem., 1994, 98, 8343. [all data]
Smith and Patrick, 1983
Smith, G.P.; Patrick, R.,
Int. J. Chem. Kinet., 1983, 15, 167. [all data]
Notes
Go To: Top, Reaction thermochemistry data, References
- Symbols used in this document:
ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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