Ethanol - The NIST WebBook

Ethanol

• Formula: C2H6O
• Molecular weight: 46.0684
• IUPAC Standard InChI: InChI=1S/C2H6O/c1-2-3/h3H,2H2,1H3 Copy
• IUPAC Standard InChIKey: LFQSCWFLJHTTHZ-UHFFFAOYSA-N Copy
• CAS Registry Number: 64-17-5
• Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file View 3d structure (requires JavaScript / HTML 5)
• Isotopologues:
  • [2H6]ethanol
  • Ethanol-d1
  • C2H3D3O
  • Ethanol-d5
  • Ethanol-1,1-d2
• Other names: Ethyl alcohol; Alcohol; Alcohol anhydrous; Algrain; Anhydrol; Denatured ethanol; Ethyl hydrate; Ethyl hydroxide; Jaysol; Jaysol S; Methylcarbinol; SD Alchol 23-hydrogen; Tecsol; C2H5OH; Absolute ethanol; Cologne spirit; Fermentation alcohol; Grain alcohol; Molasses alcohol; Potato alcohol; Aethanol; Aethylalkohol; Alcohol, dehydrated; Alcool ethylique; Alcool etilico; Alkohol; Cologne spirits; Denatured alcohol CD-10; Denatured alcohol CD-5; Denatured alcohol CD-5a; Denatured alcohol SD-1; Denatured alcohol SD-13a; Denatured alcohol SD-17; Denatured alcohol SD-23a; Denatured alcohol SD-28; Denatured alcohol SD-3a; Denatured alcohol SD-30; Denatured alcohol SD-39b; Denatured alcohol SD-39c; Denatured alcohol SD-40m; Etanolo; Ethanol 200 proof; Ethyl alc; Etylowy alkohol; EtOH; NCI-C03134; Spirits of wine; Spirt; Alkoholu etylowego; Ethyl alcohol anhydrous; SD alcohol 23-hydrogen; UN 1170; Tecsol C; Alcare Hand Degermer; Absolute alcohol; Denatured alcohol; Ethanol, silent spirit; Ethylol; Punctilious ethyl alcohol; SD 3A
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• Information on this page:
  • Enthalpy of formation of gas at standard conditions (nominally 298.15 K, 1 atm.)
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data: reactions 1 to 50, reactions 51 to 77
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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Enthalpy of formation of gas at standard conditions (nominally 298.15 K, 1 atm.)

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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 - Donald R. Burgess, Jr. ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

ΔfH°gas (kJ/mol)	Method	Reference	Comment
-234.7	N/A	Chao and Rossini, 1965	Value computed using ΔfHliquid° value of -277.0±0.3 kj/mol from Chao and Rossini, 1965 and ΔvapH° value of 42.3 kj/mol from Green, 1960.; DRB
-234.7 ± 0.3	Ccb	Chao and Rossini, 1965	Value computed using ΔfHliquid° from Chao and Rossini, 1965 and ΔvapH° value of 42.3 kJ/mol from Wadso, 1966.; DRB
-235.3 ± 0.50	Ccb	Green, 1960	ALS
-235.3	N/A	Kelley, 1929	Value computed using ΔfHliquid° value of -277.6 kj/mol from Kelley, 1929 and ΔvapH° value of 42.3 kj/mol from Green, 1960.; DRB
-235.3 ± 2.0	Cm	Kelley, 1929	Value computed using ΔfHliquid° from Kelley, 1929 and ΔvapH° value of 42.3 kJ/mol from Wadso, 1966. estimated uncertainty; DRB
-232.4	N/A	Parks, 1925	Value computed using ΔfHliquid° value of -274.7 kj/mol from Parks, 1925 and ΔvapH° value of 42.3 kj/mol from Green, 1960.; DRB
-232.4 ± 2.0	Ccb	Parks, 1925	Value computed using ΔfHliquid° from Parks, 1925 and ΔvapH° value of 42.3 kJ/mol from Wadso, 1966. estimated uncertainty; DRB
-233.9 ± 5.0	Ccb	Richards and Davis, 1920	Value computed using ΔfHliquid° from Richards and Davis, 1920 and ΔvapH° value of 42.3 kJ/mol from Wadso, 1966. estimated uncertainty; DRB
-233.6 ± 5.0	Ccb	Emery and Benedict, 1911	Value computed using ΔfHliquid° from Emery and Benedict, 1911 and ΔvapH° value of 42.3 kJ/mol from Wadso, 1966. estimated uncertainty; DRB

References

Go To: Top, Enthalpy of formation of gas at standard conditions (nominally 298.15 K, 1 atm.), Notes

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

Chao and Rossini, 1965 Chao, J.; Rossini, F.D., Heats of combustion, formation, and isomerization of nineteen alkanols, J. Chem. Eng. Data, 1965, 10, 374-379. [all data]

Green, 1960 Green, J.H.S., Revision of the values of the heats of formation of normal alcohols, Chem. Ind. (London), 1960, 1215-1216. [all data]

Wadso, 1966 Wadso, I., Acta Chem. Scand., 1966, 20, 544. [all data]

Kelley, 1929 Kelley, K.K., The heat capacities of ethyl and hexyl alcohols from 16°K. to 298°K. and the corresponding entropies and free energies and free energies, J. Am. Chem. Soc., 1929, 51, 779-781. [all data]

Parks, 1925 Parks, G.S., Thermal data on organic compounds I. The heat capacities and free energies of methyl, ethyl and normal-butyl alcohols, J. Am. Chem. Soc., 1925, 47, 338-345. [all data]

Richards and Davis, 1920 Richards, T.W.; Davis, H.S., The heats of combustion of benzene, toluene, aliphatic alcohols, cyclohexanol, and other carbon compounds, J. Am. Chem. Soc., 1920, 42, 1599-1617. [all data]

Emery and Benedict, 1911 Emery, A.G.; Benedict, F.G., The heat of combustion of compounds of physiological importance, Am. J. Physiol., 1911, 28, 301-307. [all data]

Notes

Go To: Top, Enthalpy of formation of gas at standard conditions (nominally 298.15 K, 1 atm.), References

• Symbols used in this document:

  ΔfH°gas

  Enthalpy of formation of gas at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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