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Pentanoic 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 as indicated in comments:
DRB - Donald R. Burgess, Jr.
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
Deltafgas-491. ± 20.kJ/molAVGN/AAverage of 8 values; Individual data points
Quantity Value Units Method Reference Comment
gas439.82 ± 0.63J/mol*KN/AMcDougall L.A., 1965GT

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
Deltafliquid-558.9 ± 0.7kJ/molCcbAdriaanse, Dekker, et al., 1965DRB
Deltafliquid-560.24 ± 0.67kJ/molCcbLebedeva, 1964ALS
Deltafliquid-560.2 ± 0.7kJ/molCcbLebedeva, 1964DRB
Deltafliquid-546.6 ± 5.9kJ/molCcbHancock, Watson, et al., 1954Reanalyzed by Cox and Pilcher, 1970, Original value = -548. kJ/mol; ALS
Deltafliquid-563.3 ± 1.3kJ/molCcbSchjanberg, 1937DRB
Quantity Value Units Method Reference Comment
Deltacliquid-2837.8 ± 0.7kJ/molCcbAdriaanse, Dekker, et al., 1965Corresponding «DELTA»fliquid = -558.9 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-2836.5 ± 0.67kJ/molCcbLebedeva, 1964Corresponding «DELTA»fliquid = -560.15 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-2850.1 ± 5.9kJ/molCcbHancock, Watson, et al., 1954Reanalyzed by Cox and Pilcher, 1970, Original value = -2850. kJ/mol; Corresponding «DELTA»fliquid = -546.56 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-2833.4 ± 1.3kJ/molCcbSchjanberg, 1937Reanalyzed by Cox and Pilcher, 1970, Original value = -2831. ± 4.2 kJ/mol; At 20 C; Corresponding «DELTA»fliquid = -563.29 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
liquid259.83J/mol*KN/AMcDougall and Kilpatrick, 1965DH
Quantity Value Units Method Reference Comment
Deltacsolid-2838.8kJ/molCcbSkuratov and Bonetskaya, 1966Corresponding «DELTA»fsolid = -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
197.298.15Konicek and Wadso, 1971DH
210.33298.15McDougall and Kilpatrick, 1965T = 15 to 300 K.; DH

Reaction 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:
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

C5H9O2- + Hydrogen cation = Pentanoic acid

By formula: C5H9O2- + H+ = C5H10O2

Quantity Value Units Method Reference Comment
Deltar1449. ± 8.8kJ/molG+TSCaldwell, Renneboog, et al., 1989gas phase; B
Deltar1448. ± 10.kJ/molG+TSMcLuckey, Cameron, et al., 1981gas phase; B
Quantity Value Units Method Reference Comment
Deltar1419. ± 8.4kJ/molIMRECaldwell, Renneboog, et al., 1989gas phase; B
Deltar1419. ± 9.6kJ/molCIDCMcLuckey, Cameron, et al., 1981gas phase; B

2Hydrogen + 3-Pentynoic acid = Pentanoic acid

By formula: 2H2 + C5H6O2 = C5H10O2

Quantity Value Units Method Reference Comment
Deltar-275. ± 5.0kJ/molChydFlitcroft and Skinner, 1958liquid phase; ALS

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes

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

McDougall L.A., 1965
McDougall L.A., Entropy and related thermodynamic properties of n-valeric acid, J. Chem. Phys., 1965, 42, 2307-2310. [all data]

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]

Caldwell, Renneboog, et al., 1989
Caldwell, G.; Renneboog, R.; Kebarle, P., Gas Phase Acidities of Aliphatic Carboxylic Acids, Based on Measurements of Proton Transfer Equilibria, Can. J. Chem., 1989, 67, 4, 661, https://doi.org/10.1139/v89-092 . [all data]

McLuckey, Cameron, et al., 1981
McLuckey, S.A.; Cameron, D.; Cooks, R.G., Proton affinities from the dissociation of proton bound dimers, J. Am. Chem. Soc., 1981, 103, 1313. [all data]

Flitcroft and Skinner, 1958
Flitcroft, T.L.; Skinner, H.A., Heats of hydrogenation Part 2.-Acetylene derivatives, Trans. Faraday Soc., 1958, 54, 47-53. [all data]


Notes

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