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Benzene, 1,4-difluoro-

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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
Tboil360. - 361.KN/APCR Inc., 1990BS
Tboil362.2KN/AWeast and Grasselli, 1989BS
Tboil362.KN/AMajer and Svoboda, 1985 
Tboil362.KN/ABergmann, Berkovic, et al., 1956Uncertainty assigned by TRC = 3. K; TRC
Quantity Value Units Method Reference Comment
Tfus249.6KN/AGoates, Ott, et al., 1976Uncertainty assigned by TRC = 0.08 K; TRC
Quantity Value Units Method Reference Comment
Deltavap35.62kJ/molN/AMajer and Svoboda, 1985 
Deltavap35.8kJ/molN/AOsborn and Scott, 1980Based on data from 300. - 400. K. See also Basarová and Svoboda, 1991.; AC
Deltavap35.68kJ/molVFindlay, 1969ALS
Deltavap35.6 ± 0.2kJ/molVGood, Lacina, et al., 1962Corrected for CODATA value of «DELTA»fH; ALS

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Reference Comment
31.77362.Majer and Svoboda, 1985 

Temperature of phase transition

Ttrs (K) Initial Phase Final Phase Reference Comment
249.45crystaline, IliquidLichanot, 1991DH

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
0.00198.crystaline, IIcrystaline, ILichanot, 1991Allotropic transformation.; 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:


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.

PCR Inc., 1990
PCR Inc., Research Chemicals Catalog 1990-1991, PCR Inc., Gainesville, FL, 1990, 1. [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]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Bergmann, Berkovic, et al., 1956
Bergmann, E.D.; Berkovic, S.; Ikan, R., A New Method for the Preparation of Aromatic Fluorine Compounds, J. Am. Chem. Soc., 1956, 78, 6037-9. [all data]

Goates, Ott, et al., 1976
Goates, J.R.; Ott, J.B.; Moellmer, J.F., Solid + Liquid Phase Equilibria and Solid-compound Formation in Halobenzenes + Aromatic Hydrocarbons, J. Chem. Thermodyn., 1976, 8, 217. [all data]

Osborn and Scott, 1980
Osborn, A.G.; Scott, D.W., Vapor pressures of 17 miscellanenous organic compounds, J. Chem. Thermodyn., 1980, 12, 429-438. [all data]

Basarová and Svoboda, 1991
Basarová, Pavlína; Svoboda, Václav, Calculation of heats of vaporization of halogenated hydrocarbons from saturated vapour pressure data, Fluid Phase Equilibria, 1991, 68, 13-34, https://doi.org/10.1016/0378-3812(91)85008-I . [all data]

Findlay, 1969
Findlay, T.J.V., Vapor pressures of fluorobenzenes from 5° to 50°C, J. Chem. Eng. Data, 1969, 14, 229. [all data]

Good, Lacina, et al., 1962
Good, W.D.; Lacina, J.L.; Scott, D.W.; McCullough, J.P., Combustion calorimetry of organic fluorine compounds. The heats of combustion and formation of the difluorobenzenes, 4-fluorotoluene and m-trifluorotoluic acid, J. Phys. Chem., 1962, 66, 1529-1532. [all data]

Lichanot, 1991
Lichanot, A., Heat capacities of fluroaniline, fluorophenol and difluorobenzene in condensed phase, Thermochim. Acta, 1991, 177, 265-272. [all data]


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