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Pentanoic acid

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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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil459. ± 2.KAVGN/AAverage of 34 out of 41 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus239.15KN/AAnonymous, 1968Uncertainty assigned by TRC = 2. K; TRC
Tfus239.7KN/AAdriaanse, Dekker, et al., 1964Uncertainty assigned by TRC = 0.1 K; TRC
Tfus238.4KN/AAnonymous, 1956Uncertainty assigned by TRC = 0.6 K; TRC
Tfus238.7KN/ATimmermans, 1935Uncertainty assigned by TRC = 1.5 K; TRC
Tfus238.65KN/ATimmermans, 1934Uncertainty assigned by TRC = 0.4 K; TRC
Quantity Value Units Method Reference Comment
Ttriple239.49KN/AMcDougall and Kilpatrick, 1965Uncertainty assigned by TRC = 0.06 K; TRC
Quantity Value Units Method Reference Comment
Tc644. ± 10.KAVGN/AAverage of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Pc35.83atmN/ATeja and Rosenthal, 1991Uncertainty assigned by TRC = 0.30 atm; TRC
Pc35.81atmN/AAndereya and Chase, 1990Uncertainty assigned by TRC = 0.39 atm; TRC
Pc35.53atmN/AAmbrose and Ghiassee, 1987Uncertainty assigned by TRC = 0.987 atm; TRC
Pc35.178atmN/AD'Souza and Teja, 1987Uncertainty assigned by TRC = 0.89 atm; Ambrose's procedure; TRC
Quantity Value Units Method Reference Comment
rhoc2.94mol/lN/ATeja and Anselme, 1990Uncertainty assigned by TRC = 0.06 mol/l; TRC
Quantity Value Units Method Reference Comment
Deltavap16. ± 1.kcal/molAVGN/AAverage of 6 values; Individual data points

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
13.8388.EBAmbrose and Ghiassee, 1987, 2Based on data from 373. - 465. K.; AC
13.9390.AStephenson and Malanowski, 1987Based on data from 375. - 523. K.; AC

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
345.6 - 446.93.2018879.771-172.237Kahlbaum, 1883Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Reference Comment
3.38470239.49McDougall and Kilpatrick, 1965, 2DH
3.384239.5Domalski and Hearing, 1996AC

Entropy of fusion

DeltafusS (cal/mol*K) Temperature (K) Reference Comment
14.13239.49McDougall and Kilpatrick, 1965, 2DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Go To: Top, Phase change data, Notes

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

Anonymous, 1968
Anonymous, X., Chemicals and Plastics Physical Properties, 1968, Union Carbide Corp., product bulletin, 1968. [all data]

Adriaanse, Dekker, et al., 1964
Adriaanse, N.; Dekker, H.; Coops, J., Some Physical Constants of Normal, Saturated Fatty Acids and Their Methyl Esters, Recl. Trav. Chim. Pays-Bas, 1964, 83, 557. [all data]

Anonymous, 1956
Anonymous, R., , Physical Properties of Chemical Substances, Dow Chemical Company, 1956. [all data]

Timmermans, 1935
Timmermans, J., Researches in Stoichiometry. I. The Heat of Fusion of Organic Compounds., Bull. Soc. Chim. Belg., 1935, 44, 17-40. [all data]

Timmermans, 1934
Timmermans, J., Theory of Concentrated Solutions XII., Bull. Soc. Chim. Belg., 1934, 43, 626. [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, 2307-10. [all data]

Teja and Rosenthal, 1991
Teja, A.S.; Rosenthal, D.J., The critical pressures and temperatures of ten substances using a low residence time flow apparatus in Experimental Results for Phase Equilibria and Pure Component Properties, DIPPR DATA Series No. 1, 1991. [all data]

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

Ambrose and Ghiassee, 1987
Ambrose, D.; Ghiassee, N.B., Vapor Pressures and Critical Temperatures and Critical Pressures of Some Alkanoic Acids: C1 to C10, J. Chem. Thermodyn., 1987, 19, 505. [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]

Teja and Anselme, 1990
Teja, A.S.; Anselme, M.J., The critical properties of thermally stable and unstable fluids. I. 1985 results, AIChE Symp. Ser., 1990, 86, 279, 115-21. [all data]

Ambrose and Ghiassee, 1987, 2
Ambrose, D.; Ghiassee, N.B., Vapour pressures and critical temperatures and critical pressures of some alkanoic acids: C1 to C10, The Journal of Chemical Thermodynamics, 1987, 19, 5, 505-519, https://doi.org/10.1016/0021-9614(87)90147-9 . [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]

Kahlbaum, 1883
Kahlbaum, Georg W.A., Ueber die Abhängigkeit der Siedetemperatur vom Luftdruck, Ber. Dtsch. Chem. Ges., 1883, 16, 2, 2476-2484, https://doi.org/10.1002/cber.188301602178 . [all data]

McDougall and Kilpatrick, 1965, 2
McDougall, L.A.; Kilpatrick, J.E., Entropy and related thermodynamic properties of n-valeric acid, J. Chem. Phys., 1965, 42, 2307-2310. [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]


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