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Octadecanoic acid

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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:
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-891. ± 2.kJ/molCcbLebedeva, 1964Hfusion =10.81±0.10 kcal/mol; ALS
Quantity Value Units Method Reference Comment
Deltacliquid-11280.1 ± 1.9kJ/molCcbAdriaanse, Dekker, et al., 1965Reanalyzed by Cox and Pilcher, 1970, Original value = -11279.4 ± 1.9 kJ/mol; Hfusion=63.0 kJ/mol; Corresponding «DELTA»fliquid = -948.0 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-11336.8 ± 2.1kJ/molCcbLebedeva, 1964Hfusion =10.81±0.10 kcal/mol; Corresponding «DELTA»fliquid = -891.28 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
Deltafsolid-912. ± 11.kJ/molCcbMedard and Thomas, 1952Reanalyzed by Cox and Pilcher, 1970, Original value = -897.9 kJ/mol; Author's hf291_condensed=-223.8 kcal/mol; ALS
Quantity Value Units Method Reference Comment
Deltacsolid-11290.79kJ/molCcbShkaraputa, Danilenko, et al., 1984Corresponding «DELTA»fsolid = -937.33 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacsolid-11271. ± 13.kJ/molCcbSwain, Silbert, et al., 1964Corresponding «DELTA»fsolid = -956.9 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacsolid-11316. ± 11.kJ/molCcbMedard and Thomas, 1952Reanalyzed by Cox and Pilcher, 1970, Original value = -11331.9 kJ/mol; Author's hf291_condensed=-223.8 kcal/mol; Corresponding «DELTA»fsolid = -912.07 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacsolid-11298.kJ/molCcbEmery and Benedict, 1911Corresponding «DELTA»fsolid = -930. kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
solid,1 bar435.6J/mol*KN/ASingleton, Ward, et al., 1950Extrapolation below 90 K, 64.4 J/mol*K.; DH

Constant pressure heat capacity of solid

Cp,solid (J/mol*K) Temperature (K) Reference Comment
501.55298.15Schaake, van Miltenburg, et al., 1982T = 80 to 355 K.; DH
561.9298.15Singleton, Ward, et al., 1950T = 154 to 350 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 by: 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

Oleic Acid + Hydrogen = Octadecanoic acid

By formula: C18H34O2 + H2 = C18H36O2

Quantity Value Units Method Reference Comment
Deltar-123.6 ± 1.6kJ/molChydRogers, Hoyte, et al., 1978liquid phase; solvent: Hexane; Authors gave two values
Deltar-125.1 ± 0.8kJ/molChydRogers, Hoyte, et al., 1978liquid phase; solvent: Hexane; Authors gave two values

2Hydrogen + Linoelaidic acid = Octadecanoic acid

By formula: 2H2 + C18H32O2 = C18H36O2

Quantity Value Units Method Reference Comment
Deltar-248.8 ± 0.5kJ/molChydRogers, Hoyte, et al., 1978liquid phase; solvent: Hexane

3Hydrogen + 9,12,15-Octadecatrienoic acid, (Z,Z,Z)- = Octadecanoic acid

By formula: 3H2 + C18H30O2 = C18H36O2

Quantity Value Units Method Reference Comment
Deltar-380.2 ± 1.9kJ/molChydRogers, Hoyte, et al., 1978liquid phase; solvent: Hexane

9-Octadecenoic acid, (E)- + Hydrogen = Octadecanoic acid

By formula: C18H34O2 + H2 = C18H36O2

Quantity Value Units Method Reference Comment
Deltar-120.2 ± 2.0kJ/molChydRogers, Hoyte, et al., 1978liquid phase; solvent: Hexane

2Hydrogen + 9,12-Octadecadienoic acid (Z,Z)- = Octadecanoic acid

By formula: 2H2 + C18H32O2 = C18H36O2

Quantity Value Units Method Reference Comment
Deltar-254.4 ± 1.5kJ/molChydRogers, Hoyte, et al., 1978liquid phase; solvent: Hexane

References

Go To: Top, 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.

Lebedeva, 1964
Lebedeva, N.D., Heats of combustion of monocarboxylic acids, Russ. J. Phys. Chem. (Engl. Transl.), 1964, 38, 1435-1437. [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]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Medard and Thomas, 1952
Medard, L.; Thomas, M., Determination des chaleurs de combustion de douze composes organiques utilises dans les poudres et enplosies, Mem. Poudres, 1952, 34, 421-442. [all data]

Shkaraputa, Danilenko, et al., 1984
Shkaraputa, L.N.; Danilenko, V.V.; Sklyar, V.T.; Kendis, M.Sh.; Ratushnaya, V.I., Changes in enthalpy in the reaction of stearic acid with dextramine, Neftepererab. Neftekhim. (Moscow), 1984, 27, 31-32. [all data]

Swain, Silbert, et al., 1964
Swain, H.A., Jr.; Silbert, L.S.; Miller, J.G., The heats of combustion of aliphatic long chain peroxyacids, t-butyl peroxyesters, and related acids and esters, J. Am. Chem. Soc., 1964, 86, 2562-2566. [all data]

Emery and Benedict, 1911
Emery, A.G.; Benedict, F.G., The heat of combustion of compounds of physiological importance, Am. J. Physiol., 1911, 28, 301-307. [all data]

Singleton, Ward, et al., 1950
Singleton, W.S.; Ward, T.L.; Dollear, F.G., Physical properties of fatty acids. I. Some dilatometric and thermal properties of stearic acid in two polymorphic forms, J. Am. Oil Chem. Soc., 1950, 27, 143-146. [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]

Rogers, Hoyte, et al., 1978
Rogers, D.W.; Hoyte, O.P.A.; Ho, R.K.C., Heats of hydrogenation of large molecules. Part 2. Six unsaturated and polyunsaturated fatty acids, J. Chem. Soc. Faraday Trans. 1, 1978, 74, 46-52. [all data]


Notes

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