Acetic anhydride
- Formula: C4H6O3
- Molecular weight: 102.0886
- IUPAC Standard InChI: InChI=1S/C4H6O3/c1-3(5)7-4(2)6/h1-2H3
- IUPAC Standard InChIKey: WFDIJRYMOXRFFG-UHFFFAOYSA-N
- CAS Registry Number: 108-24-7
- 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. - Other names: Acetic acid, anhydride; Acetic oxide; Acetyl anhydride; Acetyl ether; Acetyl oxide; Ethanoic anhydride; (CH3CO)2O; Ethanoic anhydrate; Acetanhydride; Anhydride acetique; Anhydrid kyseliny octove; Anidride acetica; Azijnzuuranhydride; Essigsaeureanhydrid; Octowy bezwodnik; UN 1715; Acetyl acetate; Acetic acid, 1,1'-anhydride
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Glushko Thermocenter, Russian Academy of Sciences, Moscow
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°gas | 389.95 | J/mol*K | N/A | Stull D.R., 1969 |
Constant pressure heat capacity of gas
| Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 99.50 | 298.15 | Stull D.R., 1969 | Selected values were based on an approximation of heat capacities from Cp(T) values of acetic acid. |
| 100.04 | 300. | ||
| 129.12 | 400. | ||
| 153.89 | 500. | ||
| 174.14 | 600. | ||
| 191.38 | 700. | ||
| 204.64 | 800. | ||
| 216.06 | 900. | ||
| 226.40 | 1000. |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -625.0 ± 3.4 | kJ/mol | Cm | Guthrie, 1974 | Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -628.4 ± 3.3 kJ/mol; Heat of hydrolysis[kcal/mol]=-40.6±0.80; ALS |
Constant pressure heat capacity of liquid
| Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 168.2 | 303.2 | Phillip, 1939 | DH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Stull D.R., 1969
Stull D.R., Jr.,
The Chemical Thermodynamics of Organic Compounds. Wiley, New York, 1969. [all data]
Guthrie, 1974
Guthrie, J.P.,
Hydration of carboxamides. Evaluation of the free energy change for addition of water to acetamide and formamide derivatives,
J. Am. Chem. Soc., 1974, 96, 3608-3615. [all data]
Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P.,
Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]
Phillip, 1939
Phillip, N.M.,
Adiabatic and isothermal compressibilities of liquids,
Proc. Indian Acad. Sci., 1939, A9, 109-120. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas Cp,liquid Constant pressure heat capacity of liquid S°gas Entropy of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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