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Isobutene

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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:
ALS - H.Y. Afeefy, J.F. Liebman, and S.E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

QuantityValueUnitsMethodReferenceComment
Deltafgas-17.9 ± 1.1kJ/molCmProsen, Maron, et al., 1951ALS
QuantityValueUnitsMethodReferenceComment
Deltacgas-2699.5 ± 1.0kJ/molCmProsen, Maron, et al., 1951Corresponding «DELTA»fgas = -17.9 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacgas-2722.kJ/molCcbGuinchant, 1918Corresponding «DELTA»fgas = 4.6 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
QuantityValueUnitsMethodReferenceComment
gas293.59J/mol*KN/AStull D.R., 1969This value was obtained on the basis of calorimetric data [ Todd S.S., 1936]. Experimental value of S(298 K)=288.7 J/mol*K [ Todd S.S., 1936] could not be recommended because of its large uncertainty.; GT

Constant pressure heat capacity of gas

Cp,gas (J/mol*K)Temperature (K)ReferenceComment
35.6850.Thermodynamics Research Center, 1997p=1 bar. Recommended values are in close agreement with other statistically calculated values [ Kilpatrick J.E., 1946] as well as with ab initio value of S(298.15 K)=293.37 J/mol*K [ East A.L.L., 1997].; GT
45.92100.
56.83150.
67.34200.
82.72273.15
88.09298.15
88.49300.
109.79400.
129.35500.
146.48600.
161.35700.
174.30800.
185.59900.
195.451000.
204.031100.
211.501200.
217.991300.
223.651400.
228.581500.
238.391750.
245.512000.
250.792250.
254.782500.
257.832750.
260.203000.

Constant pressure heat capacity of gas

Cp,gas (J/mol*K)Temperature (K)ReferenceComment
75.86 ± 0.38239.15Scott R.B., 1945GT
82.89 ± 0.41272.15
91.67 ± 0.46312.15
100.25 ± 0.50353.15

References

Go To: Top, Gas phase thermochemistry data, Notes

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

Prosen, Maron, et al., 1951
Prosen, E.J.; Maron, F.W.; Rossini, F.D., Heats of combustion, formation, and insomerization of ten C4 hydrocarbons, J. Res. NBS, 1951, 46, 106-112. [all data]

Guinchant, 1918
Guinchant, M.J., Etude sur la fonction acide dans les derives metheniques et methiniques, Ann. Chem., 1918, 10, 30-84. [all data]

Stull D.R., 1969
Stull D.R., Jr., The Chemical Thermodynamics of Organic Compounds. Wiley, New York, 1969. [all data]

Todd S.S., 1936
Todd S.S., Thermal data on organic compounds. XV. Some heat capacity, entropy and free energy data for the isomeric butenes, J. Am. Chem. Soc., 1936, 58, 134-137. [all data]

Thermodynamics Research Center, 1997
Thermodynamics Research Center, Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]

Kilpatrick J.E., 1946
Kilpatrick J.E., Heat content, free energy function, entropy, and heat capacity of ethylene, propylene, and the four butenes to 1500 K, J. Res. Nat. Bur. Stand, 1946, 37, 163-171. [all data]

East A.L.L., 1997
East A.L.L., Ab initio statistical thermodynamical models for the computation of third-law entropies, J. Chem. Phys., 1997, 106, 6655-6674. [all data]

Scott R.B., 1945
Scott R.B., Specific heats of gaseous 1,3-butadiene, isobutene, styrene, and ethylbenzene, J. Res. Nat. Bur. Stand., 1945, 34, 243-254. [all data]


Notes

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