1-Butene, 3-methyl-

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.

Gas phase thermochemistry data

Go To: Top, References, Notes

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
Δfgas-25.5kJ/molN/AGood and Smith, 1979Value computed using ΔfHliquid° value of -51.6±0.62 kj/mol from Good and Smith, 1979 and ΔvapH° value of 26.1 kj/mol from alkenes correlation.; DRB

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
115.298.15Thermodynamics Research Center, 1997p=1 bar. Recommended values were calculated from data for lower alkenes by a method of increments (see also [ Kilpatrick J.E., 1946]). The results of two statistical thermodynamics calculations [ Radyuk Z.A., 1973, Durig J.R., 1980] are in much more disagreement with experimental entropies (2.6 and 5.1 J/mol*K for S(298.15 K), respectively) than estimated TRC values.; GT


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.

Good and Smith, 1979
Good, W.D.; Smith, N.K., The enthalpies of combustion of the isomeric pentenes in the liquid state. A warning to combustion calorimetrists about sample drying, J. Chem. Thermodyn., 1979, 11, 111-118. [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., Heats, equilibrium constants, and free energies of formation of the monoolefin hydrocarbons, J. Res. Nat. Bur. Stand, 1946, 36, 559-612. [all data]

Radyuk Z.A., 1973
Radyuk Z.A., Equilibrium of isomerization and thermodynamic properties of methylbutenes, Neftekhimiya, 1973, 13, 356-360. [all data]

Durig J.R., 1980
Durig J.R., Torsional spectra of molecules with two internal C3v rotors. 19. Vibrational spectra, torsional potential functions, and conformational and thermodynamic properties of 2-methyl-1-butene, J. Phys. Chem., 1980, 84, 3554-3561. [all data]


Go To: Top, Gas phase thermochemistry data, References