Thiophene, 2,5-dimethyl-

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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 by: Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
liquid244.72J/mol*KN/ACarlson and Westrum, 1965 

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
178.32298.15Carlson and Westrum, 1965T = 5 to 305 K.

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, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil409.7KN/AWeast and Grasselli, 1989BS
Quantity Value Units Method Reference Comment
Ttriple204.87KN/ACarlson and Westrum, 1965, 2Metastable crystal phase; Uncertainty assigned by TRC = 0.06 K; TRC
Ttriple210.58KN/ACarlson and Westrum, 1965, 2Uncertainty assigned by TRC = 0.03 K; TRC
Quantity Value Units Method Reference Comment
Δvap40.2 ± 0.9kJ/molCRibeiro da Silva and Santos, 2008AC

Reduced pressure boiling point

Tboil (K) Pressure (bar) Reference Comment
407.20.987Aldrich Chemical Company Inc., 1990BS

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
39.7348.IAStephenson and Malanowski, 1987Based on data from 333. to 374. K. See also Eon, Pommier, et al., 1971 and Dykyj, Svoboda, et al., 1999.; AC

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
333.4 to 373.54.87371925.967-12.704Eon, Pommier, et al., 1971Coefficents calculated by NIST from author's data.

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Reference Comment
8.91210.6Domalski and Hearing, 1996AC

Enthalpy of phase transition

ΔHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
8.1910210.58crystaline, IliquidCarlson and Westrum, 1965DH
7.4011204.87crystaline, IIliquidCarlson and Westrum, 1965Metastable crystals. Note error in table on Hm and Tm.; DH

Entropy of phase transition

ΔStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
38.90210.58crystaline, IliquidCarlson and Westrum, 1965DH
36.12204.87crystaline, IIliquidCarlson and Westrum, 1965Metastable; DH

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:


References

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

Carlson and Westrum, 1965
Carlson, H.G.; Westrum, E.F., Jr., 2,5-Dimethylthiophene. Heat capacities and thermodynamic properties from 5 to 300 K and fusion of stable and metastable phases, J. Phys. Chem., 1965, 68, 1524-1530. [all data]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Carlson and Westrum, 1965, 2
Carlson, H.G.; Westrum, E.F., 2,5-Dimethylthiopnehe. Heat Capacities and Thermodynamic Properties from 5 to 300 K and Fusion of Stable and Metastable Phases, J. Phys. Chem., 1965, 69, 1524. [all data]

Ribeiro da Silva and Santos, 2008
Ribeiro da Silva, Manuel A.V.; Santos, Ana Filipa L.O.M., Experimental study on the thermochemistry of 2,5-dimethylthiophene and its acetyl derivative, The Journal of Chemical Thermodynamics, 2008, 40, 8, 1217-1221, https://doi.org/10.1016/j.jct.2008.04.005 . [all data]

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [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]

Eon, Pommier, et al., 1971
Eon, C.; Pommier, C.; Guiochon, G., Vapor pressures and second virial coefficients of some five-membered heterocyclic derivatives, J. Chem. Eng. Data, 1971, 16, 4, 408-410, https://doi.org/10.1021/je60051a008 . [all data]

Dykyj, Svoboda, et al., 1999
Dykyj, J.; Svoboda, J.; Wilhoit, R.C.; Frenkel, M.L.; Hall, K.R., Vapor Pressure of Chemicals: Part A. Vapor Pressure and Antoine Constants for Hydrocarbons and Sulfur, Selenium, Tellurium and Hydrogen Containing Organic Compounds, Springer, Berlin, 1999, 373. [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]


Notes

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