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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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny, director
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil397. ± 4.KAVGN/AAverage of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus285.75KN/AAnonymous, 1968TRC
Tfus284.15KN/ABiltz, Fischer, et al., 1930Uncertainty assigned by TRC = 1. K; TRC
Tfus285.65KN/ACooper, 1928Uncertainty assigned by TRC = 0.2 K; TRC
Tfus286.KN/ALouguinine and Dupont, 1911Uncertainty assigned by TRC = 0.5 K; TRC
Tfus285.70KN/AHollmann, 1903Uncertainty assigned by TRC = 0.1 K; TRC
Quantity Value Units Method Reference Comment
Ttriple285.7KN/AClegg and Melia, 1969Crystal phase 1 phase; Uncertainty assigned by TRC = 0.1 K; TRC
Quantity Value Units Method Reference Comment
Tc563.KN/AHollmann, 1903Uncertainty assigned by TRC = 4. K; TRC
Quantity Value Units Method Reference Comment
Deltavap10.9kcal/molN/APihlaja and Tuomi, 1970DRB
Deltavap9.9 ± 0.1kcal/molVFletcher, Mortimer, et al., 1959ALS

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
9.92338.AStephenson and Malanowski, 1987Based on data from 323. - 396. K.; AC

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Reference Comment
3.231285.7Domalski and Hearing, 1996AC

Entropy of fusion

DeltafusS (cal/mol*K) Temperature (K) Reference Comment
0.433142.7Domalski and Hearing, 1996CAL

Enthalpy of phase transition

DeltaHtrs (kcal/mol) Temperature (K) Initial Phase Final Phase Reference Comment
0.06159142.7crystaline, IVcrystaline, IIIClegg and Melia, 1969DH
0.1848147.5crystaline, IIIcrystaline, IIClegg and Melia, 1969H and S of transition for c,II/c,I at 230.3 K has been added into H and S of fusion at 285.7 K.; DH
3.2314285.7crystaline, IliquidClegg and Melia, 1969DH

Entropy of phase transition

DeltaStrs (cal/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
0.433142.7crystaline, IVcrystaline, IIIClegg and Melia, 1969DH
1.25147.5crystaline, IIIcrystaline, IIClegg and Melia, 1969H; DH
11.31285.7crystaline, IliquidClegg and Melia, 1969DH

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:


Go To: Top, Phase change data, Notes

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

Anonymous, 1968
Anonymous, X., Chemicals and Plastics Physical Properties, 1968, Union Carbide Corp., product bulletin, 1968. [all data]

Biltz, Fischer, et al., 1930
Biltz, W.; Fischer, W.; Wunnenberg, E., Molecular and Atomic Volumes. The Volume Requirements of Crystalline Organic Compounds and Low Temperatures, Z. Phys. Chem., Abt. A, 1930, 151, 13-55. [all data]

Cooper, 1928
Cooper, D.L., The Heat Cpacities of Acetaldehyde and Paraldehyde, and the Heat of Transformation of Acetaldehyde into Paraldehyde, Proc. Trans. N. S. Inst. Sci., Pt. 1, 1928, 17. 82-90. [all data]

Louguinine and Dupont, 1911
Louguinine, W.; Dupont, G., The heat of fusion of substances which melt at ordinary temperatures., Bull. Soc. Chim. Fr., 1911, 9, 219-224. [all data]

Hollmann, 1903
Hollmann, R., Physical and natural equilibria between the modifications of aldehyde, Z. Phys. Chem., Stoechiom. Verwandtschaftsl., 1903, 43, 129-59. [all data]

Clegg and Melia, 1969
Clegg, G.A.; Melia, T.P., Thermodynamics of polymerization of heterocyclic compounds. Part IV. The heat capacity, entropy, enthalpy and free energy of paraldehyde, Makromol. Chem., 1969, 123, 194-202. [all data]

Pihlaja and Tuomi, 1970
Pihlaja, K.; Tuomi, M., Bond-Bond interactions in organic oxygen compounds. Part II. Anomalous stablization in cis-2,4,6-trimethyl-1,3,5-trioxane, Suom. Kemistil., 1970, 43, 224-226. [all data]

Fletcher, Mortimer, et al., 1959
Fletcher, S.E.; Mortimer, C.T.; Springall, H.D., Heats of combustion and molecular structure. Part VII. 1:3-dioxa- and 1:3:5-trioxa-cycloalkanes, J. Chem. Soc., 1959, 580-584. [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]

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]


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