Acetic acid

• Formula: C₂H₄O₂
• Molecular weight: 60.0520
• IUPAC Standard InChI: InChI=1S/C2H4O2/c1-2(3)4/h1H3,(H,3,4) Copy

  
• IUPAC Standard InChIKey: QTBSBXVTEAMEQO-UHFFFAOYSA-N Copy
• CAS Registry Number: 64-19-7
• 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.
• Isotopologues:
  • Acetic acid-d4
• Other names: Ethanoic acid; Ethylic acid; Glacial acetic acid; Methanecarboxylic acid; Vinegar acid; CH3COOH; Acetasol; Acide acetique; Acido acetico; Azijnzuur; Essigsaeure; Octowy kwas; Acetic acid, glacial; Kyselina octova; UN 2789; Aci-jel; Shotgun; Ethanoic acid monomer; NSC 132953
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• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data: reactions 1 to 50, reactions 51 to 79
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Vibrational and/or electronic energy levels
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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Condensed phase thermochemistry data

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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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Phase change data

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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
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Enthalpy of vaporization

Δ_vapH = A exp(-αT_r) (1 − T_r)^β
    Δ_vapH = Enthalpy of vaporization (at saturation pressure) (kcal/mol)
    T_r = reduced temperature (T / T_c)

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Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (atm)
    T = temperature (K)

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Enthalpy of sublimation

Enthalpy of fusion

Entropy of fusion

Enthalpy of phase transition

Entropy of phase transition

References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes

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

Steele, Chirico, et al., 1997
Steele, W.V.; Chirico, R.D.; Cowell, A.B.; Knipmeyer, S.E.; Nguyen, A., Thermodynamic properties and ideal-gas enthalpies of formation for 2-aminoisobutyric acid (2-methylalanine), acetic acid, (4-methyl-3-penten-2-one), 4-methylpent-1-ene, 2,2'-bis(phenylthio)propane, and glycidyl phenyl ether (1,2-epoxy-3-phenoxypropane), J. Chem. Eng. Data, 1997, 42, 1052-1066. [all data]

Lebedeva, 1964
Lebedeva, N.D., Heats of combustion of monocarboxylic acids, Russ. J. Phys. Chem. (Engl. Transl.), 1964, 38, 1435-1437. [all data]

Evans and Skinner, 1959
Evans, F.W.; Skinner, H.A., The heat of combustion of acetic acid, Trans. Faraday Soc., 1959, 55, 260-261. [all data]

Carson and Skinner, 1949
Carson, A.S.; Skinner, H.A., 201. Carbon-halogen bond energies in the acetyl halides, J. Chem. Soc., 1949, 936-939. [all data]

Schjanberg, 1935
Schjanberg, E., Die Verbrennungswarmen und die Refraktionsdaten einiger chlorsubstituierter Fettsauren und Ester., Z. Phys. Chem. Abt. A, 1935, 172, 197-233. [all data]

Martin and Andon, 1982
Martin, J.F.; Andon, R.J.L., Thermodynamic properties of organic oxygen compounds. Part LII. Molar heat capacity of ethanoic, propanoic, and butanoic acids, J. Chem. Thermodynam., 1982, 14, 679-688. [all data]

Parks and Kelley, 1925
Parks, G.S.; Kelley, K.K., Thermal data on organic compounds. II. The heat capacities of five organic compounds. The entropies and free energies of some homologous series of aliphatic compounds, J. Am. Chem. Soc., 1925, 47, 2089-2097. [all data]

Swietoslawski and Zielenkiewicz, 1958
Swietoslawski, W.; Zielenkiewicz, A., Mean specific heat of some ternary azeotropes, Bull. Acad. Pol. Sci. Ser. Sci. Chim., 1958, 6, 365-366. [all data]

Radulescu and Jula, 1934
Radulescu, D.; Jula, O., Beiträge zur Bestimmung der Abstufung der Polarität des Aminstickstoffes in den organischen Verbindungen, Z. Phys. Chem., 1934, B26, 390-393. [all data]

Neumann, 1932
Neumann, M.B., Die Untersuchung der Wärmekapazität vom binären System CH₃COOH + H₂O bei verschiedenen Temperaturen, Z. Phys. Chem., 1932, A158, 258-264. [all data]

Parks, Kelley, et al., 1929
Parks, G.S.; Kelley, K.K.; Huffman, H.M., Thermal data on organic compounds. V. A revision of the entropies and free energies of nineteen organic compounds, J. Am. Chem. Soc., 1929, 51, 1969-1973. [all data]

Pickering, 1895
Pickering, S.U., A comparison of some properties of acetic acid and its chloro- and bromo-derivatives, J. Chem. Soc., 1895, 67, 664-684. [all data]

von Reis, 1881
von Reis, M.A., Die specifische Wärme flüssiger organischer Verbindungen und ihre Beziehung zu deren Moleculargewicht, Ann. Physik [3], 1881, 13, 447-464. [all data]

Wilhoit, Chao, et al., 1985
Wilhoit, R.C.; Chao, J.; Hall, K.R., Thermodynamic Properties of Key Organic Compounds in the Carbon Range C1 to C4. Part 1. Properties of Condensed Phases, J. Phys. Chem. Ref. Data, 1985, 14, 1. [all data]

Martin and Andon, 1982, 2
Martin, J.F.; Andon, R.J.L., Thermodynamic properties of organic oxygen compounds. Part LII. Molar heat capacity of ethanoic, propanoic, and butanoic acids., J. Chem. Thermodyn., 1982, 14, 679-88. [all data]

Parks and Kelley, 1925, 2
Parks, G.S.; Kelley, K.K., Thermal Data on Organic Compounds II. The Heat Capacities of Five Organic Compounds. The Entropies and Free Energies of Some Homologous Series of Aliphatic Compounds, J. Am. Chem. Soc., 1925, 47, 2089-97. [all data]

Andereya and Chase, 1990
Andereya, E.; Chase, J.D., Chem. Eng. Technol., 1990, 13, 304-12. [all data]

D'Souza and Teja, 1987
D'Souza, R.; Teja, A.S., The prediction of the vapor pressures of carboxylic acids, Chem. Eng. Commun., 1987, 61, 13. [all data]

Ambrose, Ellender, et al., 1977
Ambrose, D.; Ellender, J.H.; Sprake, C.H.S.; Townsend, R., Thermo. Prop. of Org. Oxygen Compounds XLV. The Vapor Pressure of Acetic Acid, J. Chem. Thermodyn., 1977, 9, 735. [all data]

Young, 1910
Young, S., The Internal Heat of Vaporization constants of thirty pure substances, Sci. Proc. R. Dublin Soc., 1910, 12, 374. [all data]

Young, 1891
Young, S., J. Chem. Soc., 1891, 59, 903. [all data]

Vandana and Teja, 1995
Vandana, V.; Teja, A.S., The critical temperatures and densities of acetic acid-water mixtures, Fluid Phase Equilib., 1995, 103, 113-18. [all data]

Verevkin, 2000
Verevkin, S.P., Measurement and Prediction of the Monocarboxylic Acids Thermochemical Properties, J. Chem. Eng. Data, 2000, 45, 5, 953-960, https://doi.org/10.1021/je990282m . [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]

Konicek and Wadso, 1970
Konicek, J.; Wadso, I., Enthalpies of vaporization of organic compounds. VII. Some carboxylic acids, Acta Chem. Scand., 1970, 24, 2612-26. [all data]

Konicek, Wadsö, et al., 1970
Konicek, Jiri; Wadsö, Ingemar; Munch-Petersen, J.; Ohlson, Ragnar; Shimizu, Akira, Enthalpies of Vaporization of Organic Compounds. VII. Some Carboxylic Acids., Acta Chem. Scand., 1970, 24, 2612-2616, https://doi.org/10.3891/acta.chem.scand.24-2612 . [all data]

Muñoz and Krähenbühl, 2001
Muñoz, Laura A.L.; Krähenbühl, M. Alvina, Isobaric Vapor Liquid Equilibrium (VLE) Data of the Systems n -Butanol + Butyric Acid and n -Butanol + Acetic Acid, J. Chem. Eng. Data, 2001, 46, 1, 120-124, https://doi.org/10.1021/je000033u . [all data]

Vercher, Vázquez, et al., 2001
Vercher, Ernesto; Vázquez, M. Isabel; Martínez-Andreu, Antoni, Isobaric Vapor-Liquid Equilibria for Water + Acetic Acid + Lithium Acetate, J. Chem. Eng. Data, 2001, 46, 6, 1584-1588, https://doi.org/10.1021/je010106p . [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Dykyj, 1970
Dykyj, J., Petrochemica, 1970, 10, 2, 51. [all data]

Tamir, Dragoescu, et al., 1983
Tamir, Abraham; Dragoescu, Claudia; Apelblat, Alexander; Wisniak, Jaime, Heats of vaporization and vapor-liquid equilibria in associated solutions containing formic acid, acetic acid, propionic acid and carbon tetrachloride, Fluid Phase Equilibria, 1983, 10, 1, 9-42, https://doi.org/10.1016/0378-3812(83)80002-8 . [all data]

McDonald, Shrader, et al., 1959
McDonald, R.A.; Shrader, S.A.; Stull, D.R., Vapor Pressures and Freezing Points of Thirty Pure Organic Compounds., J. Chem. Eng. Data, 1959, 4, 4, 311-313, https://doi.org/10.1021/je60004a009 . [all data]

Potter and Ritter, 1954
Potter, Andrew E.; Ritter, H.L., The Vapor Pressure of Acetic Acid and Acetic-d ₃ Acid-d. The Liquid Density of Acetic-d ₃ Acid-d, J. Phys. Chem., 1954, 58, 11, 1040-1042, https://doi.org/10.1021/j150521a025 . [all data]

Calis-Van Ginkel, Calis, et al., 1978
Calis-Van Ginkel, C.H.D.; Calis, G.H.M.; Timmermans, C.W.M.; de Kruif, C.G.; Oonk, H.A.J., Enthalpies of sublimation and dimerization in the vapour phase of formic, acetic, propanoic, and butanoic acids, The Journal of Chemical Thermodynamics, 1978, 10, 11, 1083-1088, https://doi.org/10.1016/0021-9614(78)90082-4 . [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Louguinine and Dupont, 1911
Louguinine, W.; Dupont, G., Bull. Soc. Chim. Fr., 1911, 9, 219. [all data]

Meyer, 1910
Meyer, J., Z. Phys. Chem., Stoechiom. Verwandtschaftsl., 1910, 72, 225. [all data]

Notes

Go To: Top, Condensed phase thermochemistry data, Phase change data, References

• Symbols used in this document:
  

  Cp,liquid	Constant pressure heat capacity of liquid
  Pc	Critical pressure
  S°liquid	Entropy of liquid at standard conditions
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  ΔHtrs	Enthalpy of phase transition
  ΔStrs	Entropy of phase transition
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔsubH	Enthalpy of sublimation
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions
  ρc	Critical density

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