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Ethanedione, diphenyl-

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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, Chris Muzny, 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
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

Quantity Value Units Method Reference Comment
Tboil619. - 621.KN/ABuckingham and Donaghy, 1982BS
Quantity Value Units Method Reference Comment
Tfus368. ± 1.KAVGN/AAverage of 9 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple368.020KN/AAndon and Connett, 1980Uncertainty assigned by TRC = 0.01 K; TRC
Ttriple368.000KN/AAndon and Connett, 1980Uncertainty assigned by TRC = 0.002 K; TRC
Quantity Value Units Method Reference Comment
Deltasub87.4kJ/molVSpringall and White, 1954ALS

Reduced pressure boiling point

Tboil (K) Pressure (bar) Reference Comment
461.0.016Buckingham and Donaghy, 1982BS

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
69.2416.AStephenson and Malanowski, 1987Based on data from 401. - 620. K. See also Stull, 1947.; 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
401.6 - 620.4.797292780.085-39.436Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of sublimation

DeltasubH (kJ/mol) Temperature (K) Method Reference Comment
98.4 ± 1.1368.5VAihara, 1959crystal phase; ALS
98.4 ± 1.1329.N/AAihara, 1959, 2Based on data from 319. - 340. K. See also Cox and Pilcher, 1970 and Stephenson and Malanowski, 1987.; AC
82.8 ± 0.8311.VWolf and Weghofer, 1938ALS

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Method Reference Comment
22.88368.1N/AFattahi, Kass, et al., 2005AC
23.8369.2DSCRai and Varma, 2001AC
23.56368.N/ADomalski and Hearing, 1996AC
22.690368.05N/ABooss and Hauschildt, 1972DH

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
61.65368.05Booss and Hauschildt, 1972DH

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
0.584.Domalski and Hearing, 1996CAL
64.02368.

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
0.044184.07crystaline, IIcrystaline, IDworkin A., 1983DH
23.556368.022crystaline, IliquidAndon and Connett, 1980, 2DH
0.044184.07crystaline, IIcrystaline, IDworkin and Fuchs, 1977DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
0.5284.07crystaline, IIcrystaline, IDworkin A., 1983DH
64.01368.022crystaline, IliquidAndon and Connett, 1980, 2DH
0.5284.07crystaline, IIcrystaline, IDworkin and Fuchs, 1977DH

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

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.

Buckingham and Donaghy, 1982
Buckingham, J.; Donaghy, S.M., Dictionary of Organic Compounds: Fifth Edition, Chapman and Hall, New York, 1982, 1. [all data]

Andon and Connett, 1980
Andon, R.J.L.; Connett, J.E., Calibrants for thermal analysis. measurement of their enthalpies of fusion by adiabatic calorimetry., Thermochim. Acta, 1980, 42, 241. [all data]

Springall and White, 1954
Springall, H.D.; White, T.R., Heats of combustion and molecular structure. Part II. The mean bond energy term for the carbonyl system in certain ketones, J. Chem. Soc., 1954, 2765-27. [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]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Aihara, 1959
Aihara, A., Estimation of the energy of hydrogen bonds formed in crystals. I. Sublimation pressures of some organic molecular crystals and the additivity of lattice energy, Bull. Chem. Soc. Jpn., 1959, 32, 1242. [all data]

Aihara, 1959, 2
Aihara, Ariyuki, Estimation of the Energy of Hydrogen Bonds Formed in Crystals. I. Sublimation Pressures of Some Organic Molecular Crystals and the Additivity of Lattice Energy, Bull. Chem. Soc. Jpn., 1959, 32, 11, 1242-1248, https://doi.org/10.1246/bcsj.32.1242 . [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press Inc., London, 1970, 643. [all data]

Wolf and Weghofer, 1938
Wolf, K.L.; Weghofer, H., Uber sublimationswarmen, Z. Phys. Chem., 1938, 39, 194-208. [all data]

Fattahi, Kass, et al., 2005
Fattahi, Alireza; Kass, Steven R.; Liebman, Joel F.; Matos, M. Agostinha R.; Miranda, Margarida S.; Morais, Victor M.F., The Enthalpies of Formation of o -, m -, and p -Benzoquinone: Gas-Phase Ion Energetics, Combustion Calorimetry, and Quantum Chemical Computations Combined, J. Am. Chem. Soc., 2005, 127, 16, 6116-6122, https://doi.org/10.1021/ja042612f . [all data]

Rai and Varma, 2001
Rai, R.N.; Varma, K.B.R., Thermal and dielectric studies on binary organic system: benzil--m-nitroaniline, Materials Letters, 2001, 48, 6, 356-361, https://doi.org/10.1016/S0167-577X(00)00327-X . [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]

Booss and Hauschildt, 1972
Booss, H.J.; Hauschildt, K.R., Die Schmelzenthalpie des Benzils und 4-Nitrophenols, Z. Anal. Chem., 1972, 261(1), 32. [all data]

Dworkin A., 1983
Dworkin A., Heat capacity, phase transition, and thermodynamic properties of benzil, J. Chem. Thermodyn., 1983, 15, 1029-1035. [all data]

Andon and Connett, 1980, 2
Andon, R.J.L.; Connett, J.E., Calibrants for thermal analysis. Measurement of their enthalpies of fusion by adiabatic calorimetry, Thermochim. Acta, 1980, 42, 241-247. [all data]

Dworkin and Fuchs, 1977
Dworkin, A.; Fuchs, A.H., Heat capacity of benzil near its phase transition, J. Chem. Phys., 1977, 67, 1789-1790. [all data]


Notes

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