Methyl Alcohol

Formula: CH₄O
Molecular weight: 32.0419
IUPAC Standard InChI: InChI=1S/CH4O/c1-2/h2H,1H3
IUPAC Standard InChIKey: OKKJLVBELUTLKV-UHFFFAOYSA-N
CAS Registry Number: 67-56-1
Chemical structure:
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Isotopologues:
Other names: Methanol; Carbinol; Methyl hydroxide; Methylol; Monohydroxymethane; Wood alcohol; CH3OH; Colonial spirit; Columbian spirit; Hydroxymethane; Wood naphtha; Alcool methylique; Alcool metilico; Columbian spirits; Metanolo; Methylalkohol; Metylowy alkohol; Pyroxylic spirit; Wood spirit; Rcra waste number U154; UN 1230; Pyro alcohol; Spirit of wood; Bieleski's solution; NSC 85232
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Gas phase thermochemistry data

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Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_gas	-205. ± 10.	kJ/mol	AVG	N/A	Average of 9 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
Δ_cH°_gas	-763.68 ± 0.20	kJ/mol	Cm	Rossini, 1932	Flame Calorimetry; Corresponding Δ_fHº_gas = -201.49 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS

Constant pressure heat capacity of gas

C_p,gas (J/mol*K)	Temperature (K)	Reference	Comment
34.00	50.	Thermodynamics Research Center, 1997	p=1 bar. Recommended entropies and heat capacities are in good agreement with other statistically calculated values [ Ivash E.V., 1955, Zhuravlev E.Z., 1959, Chen S.S., 1977, Chao J., 1986, Gurvich, Veyts, et al., 1989]. Please also see Chao J., 1986, 2.; GT
36.95	100.
38.64	150.
39.71	200.
42.59	273.15
44.06 ± 0.03	298.15
44.17	300.
51.63	400.
59.70	500.
67.19	600.
73.86	700.
79.76	800.
84.95	900.
89.54	1000.
93.57	1100.
97.12	1200.
100.24	1300.
102.98	1400.
105.40	1500.
110.2	1750.
113.8	2000.
116.5	2250.
118.6	2500.
120.	2750.
121.	3000.

Constant pressure heat capacity of gas

C_p,gas (J/mol*K)	Temperature (K)	Reference	Comment
42.4 ± 1.3	279.	Stromsoe E., 1970	Heat capacity at 279 K was obtained by thermal conductivity [ Halford J.O., 1957]. Vapor heat capacities from calorimetric measurements [ De Vries T., 1941] were converted to the ideal gas heat capacities by corrections for the gas imperfection effects [ Chen S.S., 1977, Chao J., 1986, 2]. Ideal gas heat capacities are given by [ Stromsoe E., 1970] as a linear function Cp=f1(a+bT). This expression approximates the experimental values with the average deviation of 1.17 J/molK. The accuracy of the experimental heat capacities [ Stromsoe E., 1970] is estimated as less than 0.3%. Please also see De Vries T., 1941, Weltner W., 1951, Halford J.O., 1957.; GT
48.0 ± 1.3	345.6
46.8 ± 1.2	347.35
46.1 ± 1.3	349.65
47.6 ± 1.2	356.55
46.7 ± 1.3	358.15
48.2 ± 1.3	358.85
48.8 ± 1.3	359.85
50.3 ± 1.3	368.15
49.0 ± 1.2	373.35
51.3 ± 1.3	382.15
51.1 ± 1.2	398.95
52.3 ± 1.3	401.15
51.3 ± 1.2	401.35
52.01 ± 0.42	403.2
53.2 ± 1.3	420.15
53.9 ± 1.2	431.45
54.8 ± 1.2	442.15
55.9 ± 1.3	442.65
56.0 ± 1.2	457.35
57.20 ± 0.42	464.0
57.8 ± 1.2	477.75
58.4 ± 1.2	485.05
59.5 ± 1.2	498.95
60.4 ± 1.3	521.2
61.4 ± 1.2	521.35
64.3 ± 1.2	555.95
66.4 ± 1.2	581.35
66.8 ± 1.2	585.35

References

Go To: Top, Gas phase thermochemistry data, Notes

Rossini, 1932
Rossini, F.D., The heats of combustion of methyl and ethyl alcohols, J. Res. NBS, 1932, 8, 119-139. [all data]

Thermodynamics Research Center, 1997
Thermodynamics Research Center, Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]

Ivash E.V., 1955
Ivash E.V., Thermodynamic properties of ideal gaseous methanol, J. Chem. Phys., 1955, 23, 1814-1818. [all data]

Zhuravlev E.Z., 1959
Zhuravlev E.Z., Isotopic effect on thermodynamic functions of some organic deuterocompounds in the ideal gas state, Tr. Khim. i Khim. Tekhnol., 1959, 2, 475-485. [all data]

Chen S.S., 1977
Chen S.S., Thermodynamic properties of normal and deuterated methanols, J. Phys. Chem. Ref. Data, 1977, 6, 105-112. [all data]

Chao J., 1986
Chao J., Ideal gas thermodynamic properties of simple alkanols, Int. J. Thermophys., 1986, 7, 431-442. [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]

Chao J., 1986, 2
Chao J., Thermodynamic properties of key organic oxygen compounds in the carbon range C1 to C4. Part 2. Ideal gas properties, J. Phys. Chem. Ref. Data, 1986, 15, 1369-1436. [all data]

Stromsoe E., 1970
Stromsoe E., Heat capacity of alcohol vapors at atmospheric pressure, J. Chem. Eng. Data, 1970, 15, 286-290. [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]

De Vries T., 1941
De Vries T., The heat capacity of organic vapors. I. Methyl alcohol, J. Am. Chem. Soc., 1941, 63, 1343-1346. [all data]

Weltner W., 1951
Weltner W., Jr., Methyl alcohol: the entropy, heat capacity and polymerization equilibria in the vapor, and potential barrier to internal rotation, J. Am. Chem. Soc., 1951, 73, 2606-2610. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, References

Symbols used in this document:

C_p,gas Constant pressure heat capacity of gas

Δ_cH°_gas Enthalpy of combustion of gas at standard conditions

Δ_fH°_gas Enthalpy of formation of gas at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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C_p,gas	Constant pressure heat capacity of gas
Δ_cH°_gas	Enthalpy of combustion of gas at standard conditions
Δ_fH°_gas	Enthalpy of formation of gas at standard conditions