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Propanoic acid, 2,2-dimethyl-

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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
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil436. ± 3.KAVGN/AAverage of 27 out of 32 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus308. ± 3.KAVGN/AAverage of 9 values; Individual data points
Quantity Value Units Method Reference Comment
Deltasub73.2 ± 3.0kJ/molVKruif and Oonk, 1979ALS

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
57.6 ± 0.2320.EBSteele, Chirico, et al., 2002Based on data from 344. - 472. K.; AC
54.4 ± 0.2360.EBSteele, Chirico, et al., 2002Based on data from 344. - 472. K.; AC
50.9 ± 0.2400.EBSteele, Chirico, et al., 2002Based on data from 344. - 472. K.; AC
47.0 ± 0.4440.EBSteele, Chirico, et al., 2002Based on data from 344. - 472. K.; AC

Enthalpy of sublimation

DeltasubH (kJ/mol) Temperature (K) Method Reference Comment
62.3291.GSVerevkin, 2000AC

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
2.3309.1Steele, Chirico, et al., 2002AC
2.27309.1Singh and Glicksman, 1990AC

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
8.760281.crystaline, IIcrystaline, IMurrill and Breed, 1970DH
2.479307.crystaline, IliquidMurrill and Breed, 1970DH
8.184278.3crystaline, IIcrystaline, ISingh and Glicksman, 1990DH
2.268309.085crystaline, IliquidSingh and Glicksman, 1990DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
31.4281.crystaline, IIcrystaline, IMurrill and Breed, 1970DH
7.9307.crystaline, IliquidMurrill and Breed, 1970DH

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.

Kruif and Oonk, 1979
Kruif, C.G.; Oonk, H.A.J., Enthalpies of vaporization and vapour pressures of seven aliphatic carboxylic acids, J. Chem. Thermodyn., 1979, 11, 287-290. [all data]

Steele, Chirico, et al., 2002
Steele, W.V.; Chirico, R.D.; Cowell, A.B.; Knipmeyer, S.E.; Nguyen, A., Thermodynamic Properties and Ideal-Gas Enthalpies of Formation for trans -Methyl Cinnamate, «alpha»-Methyl Cinnamaldehyde, Methyl Methacrylate, 1-Nonyne, Trimethylacetic Acid, Trimethylacetic Anhydride, and Ethyl Trimethyl Acetate, J. Chem. Eng. Data, 2002, 47, 4, 700-714, https://doi.org/10.1021/je010086r . [all data]

Verevkin, 2000
Verevkin, S.P., Measurement and Prediction of the Monocarboxylic Acids Thermochemical Properties, J. Chem. Eng. Data, 2000, 45, 5, 953-960, https://doi.org/10.1021/je990282m . [all data]

Singh and Glicksman, 1990
Singh, N.B.; Glicksman, M.E., Physical properties of ultra-pure pivalic acid, Thermochim. Acta, 1990, 159, 93-99. [all data]

Murrill and Breed, 1970
Murrill, E.; Breed, L., Solid-solid phase transitions determined by differential scanning calorimetry, Thermochim. Acta, 1970, 1, 239-246. [all data]


Notes

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