Pentanoic acid
- Formula: C5H10O2
- Molecular weight: 102.1317
- IUPAC Standard InChIKey: NQPDZGIKBAWPEJ-UHFFFAOYSA-N
- CAS Registry Number: 109-52-4
- 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: Valeric acid; n-Pentanoic acid; n-Valeric acid; Propylacetic acid; Valerianic acid; 1-Butanecarboxylic acid; n-C4H9COOH; Butanecarboxylic acid; Kyselina valerova; Valeric acid, normal; 1-Pentanoic acid; NSC 406833; Valeric acid, n-; NA 1760
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Condensed phase 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:
DRB - Donald R. Burgess, Jr.
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 | -558.9 ± 0.7 | kJ/mol | Ccb | Adriaanse, Dekker, et al., 1965 | DRB |
ΔfH°liquid | -560.24 ± 0.67 | kJ/mol | Ccb | Lebedeva, 1964 | ALS |
ΔfH°liquid | -560.2 ± 0.7 | kJ/mol | Ccb | Lebedeva, 1964 | DRB |
ΔfH°liquid | -546.6 ± 5.9 | kJ/mol | Ccb | Hancock, Watson, et al., 1954 | Reanalyzed by Cox and Pilcher, 1970, Original value = -548. kJ/mol; ALS |
ΔfH°liquid | -563.3 ± 1.3 | kJ/mol | Ccb | Schjanberg, 1937 | DRB |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -2837.8 ± 0.7 | kJ/mol | Ccb | Adriaanse, Dekker, et al., 1965 | Corresponding ΔfHºliquid = -558.9 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -2836.5 ± 0.67 | kJ/mol | Ccb | Lebedeva, 1964 | Corresponding ΔfHºliquid = -560.15 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -2850.1 ± 5.9 | kJ/mol | Ccb | Hancock, Watson, et al., 1954 | Reanalyzed by Cox and Pilcher, 1970, Original value = -2850. kJ/mol; Corresponding ΔfHºliquid = -546.56 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -2833.4 ± 1.3 | kJ/mol | Ccb | Schjanberg, 1937 | Reanalyzed by Cox and Pilcher, 1970, Original value = -2831. ± 4.2 kJ/mol; At 20 C; Corresponding ΔfHºliquid = -563.29 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 259.83 | J/mol*K | N/A | McDougall and Kilpatrick, 1965 | DH |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -2838.8 | kJ/mol | Ccb | Skuratov and Bonetskaya, 1966 | Corresponding ΔfHºsolid = -557.94 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of liquid
Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
197. | 298.15 | Konicek and Wadso, 1971 | DH |
210.33 | 298.15 | McDougall and Kilpatrick, 1965 | T = 15 to 300 K.; DH |
References
Go To: Top, 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.
Adriaanse, Dekker, et al., 1965
Adriaanse, N.; Dekker, H.; Coops, J.,
Heats of combustion of normal saturated fatty acids and their methyl esters,
Rec. Trav. Chim. Pays/Bas, 1965, 84, 393-407. [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]
Hancock, Watson, et al., 1954
Hancock, C.K.; Watson, G.M.; Gilby, R.F.,
Heats of combustion of five-carbon fatty acids and their methyl and ethyl esters,
J. Phys. Chem., 1954, 58, 127-129. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Schjanberg, 1937
Schjanberg, E.,
Die verbrennungswarmen und die refraktionsdaten einiger pentensaureeste,
Z. Phys. Chem., 1937, 178, 274-281. [all data]
McDougall and Kilpatrick, 1965
McDougall, L.A.; Kilpatrick, J.E.,
Entropy and related thermodynamic properties of n-valeric acid,
J. Chem. Phys., 1965, 42, 2307-2310. [all data]
Skuratov and Bonetskaya, 1966
Skuratov, S.M.; Bonetskaya, A.K.,
Enthalpy of formation of amide bonds,
Polym. Sci. USSR (Engl. Transl.), 1966, 8, 1754-1757. [all data]
Konicek and Wadso, 1971
Konicek, J.; Wadso, I.,
Thermochemical properties of some carboxylic acids, amines and N-substituted amides in aqueous solution,
Acta Chem. Scand., 1971, 25, 1541-1551. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔcH°solid Enthalpy of combustion of solid 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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