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Azobenzene

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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
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
Tboil566.2KN/AAldrich Chemical Company Inc., 1990BS
Quantity Value Units Method Reference Comment
Tfus341.KN/ABergmann, Fischer, et al., 1953Uncertainty assigned by TRC = 3. K; TRC
Tfus340.KN/ASorum and Durand, 1952Uncertainty assigned by TRC = 1. K; TRC
Quantity Value Units Method Reference Comment
Deltasub93.84 ± 0.12kJ/molVCammenga, Behrens, et al., 1977Hfusion=22.7 kJ/mol; ALS

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
376.7 - 566.5.091772671.499-41.23Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
22.368340.5Cingolani and Berchiesi, 1974DH
22.389342.2Eykman, 1889DH

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
65.59340.5Cingolani and Berchiesi, 1974DH
65.4342.2Eykman, 1889DH

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.

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

Bergmann, Fischer, et al., 1953
Bergmann, E.D.; Fischer, E.; Jaffe, J.H., Exalted Distortion Polarizations of Some COlored Hydrocarbons, J. Am. Chem. Soc., 1953, 75, 3230-3. [all data]

Sorum and Durand, 1952
Sorum, C.H.; Durand, E.A., The Melting of Binary Eutectics, J. Am. Chem. Soc., 1952, 74, 1071. [all data]

Cammenga, Behrens, et al., 1977
Cammenga, H.K.; Behrens, E.; Wolf, F., Thermal isomerization of cis-azobenzene in the solid state in React. Solids, [Proc. Int. Symp.],, ed. J. Wood, O. Lindqvist, C. Helgesson, Plenum: New York,NY, 1977, 481-486. [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]

Cingolani and Berchiesi, 1974
Cingolani, A.; Berchiesi, G., Thermodynamic properties of organic compounds. 1. A DSC study of phase transitions in aliphatic dicarboxylic acids, J. Therm. Anal., 1974, 6, 87-90. [all data]

Eykman, 1889
Eykman, J.F., Zur kryoskopischen Molekulargewichtsbestimmung, Z. Physik. Chem., 1889, 4, 497-519. [all data]


Notes

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