Octanoic acid

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Gas 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 by: Donald R. Burgess, Jr.

Quantity Value Units Method Reference Comment
Δfgas-132.5 ± 0.31kcal/molCcbAdriaanse, Dekker, et al., 1965Value computed using ΔfHliquid° from Adriaanse, Dekker, et al., 1965 and ΔvapH° value of 19.2 kcal/mol from Baccanari, Novinski, et al., 1968. estimated uncertainty
Δfgas-133.0kcal/molN/ALebedeva, 1964Value computed using ΔfHliquid° value of -636.89±0.54 kj/mol from Lebedeva, 1964 and ΔvapH° value of 80.3 kj/mol from missing citation.
Δfgas-132.4 ± 0.26kcal/molN/ALebedeva, 1964Value computed using ΔfHliquid° value of -636.89±0.54 kj/mol from Lebedeva, 1964 and ΔvapH° value of 82.9±1 kj/mol from missing citation.
Δfgas-133.0 ± 0.26kcal/molCcbLebedeva, 1964Value computed using ΔfHliquid° from Lebedeva, 1964 and ΔvapH° value of 19.2 kcal/mol from Baccanari, Novinski, et al., 1968. estimated uncertainty

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:
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
Δfliquid-151.7 ± 0.2kcal/molCcbAdriaanse, Dekker, et al., 1965estimated uncertainty; DRB
Δfliquid-152.22 ± 0.13kcal/molCcbLebedeva, 1964ALS
Quantity Value Units Method Reference Comment
Δcliquid-1147.2 ± 0.2kcal/molCcbAdriaanse, Dekker, et al., 1965Corresponding Δfliquid = -151.7 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Δcliquid-1146.73 ± 0.13kcal/molCcbLebedeva, 1964Corresponding Δfliquid = -152.20 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
71.205298.15Schaake, van Miltenburg, et al., 1982T = 80 to 300 K.; DH
72.80305.Garner and Randall, 1924T = 0 to 46 C. Mean value 18 to 46 C.; DH

References

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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]

Baccanari, Novinski, et al., 1968
Baccanari, D.P.; Novinski, J.A.; Pan, Y.; Yevitz, M.M.; Swain, H.A., Jr., Heats of sublimation and vaporization at 25° of long chain fatty acids and methyl esters, Trans. Faraday Soc., 1968, 64, 1201. [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]

Schaake, van Miltenburg, et al., 1982
Schaake, R.C.F.; van Miltenburg, J.C.; De Kruif, C.G., Thermodynamic properties of the normal alkanoic acids. II. Molar heat capacities of seven even-numbered normal alkanoic acids, J. Chem. Thermodynam., 1982, 14, 771-778. [all data]

Garner and Randall, 1924
Garner, W.E.; Randall, F.C., Alternation in the heats of crystallization of the normal monobasic fatty acids. Part I., J. Chem. Soc., 1924, 125, 881-896. [all data]


Notes

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