The second virial coefficients of some halogenated ethanes

Köhler, Friedrich; Nhu, Nguyen Van

doi:10.1080/00268979300102651

Cited by 21 publications

(10 citation statements)

References 9 publications

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“…To the best of our knowledge the only previous calculations of B 2 for 2CLJD molecules are those by Vega et al 26 for the refrigerant molecule CH 3 CHF 2 (R152a), and those of Kohler and van Nhu. 27 A number of remarks should be made concerning the use of the 2CLJD model to describe real substances. Firstly, given that the model has no polarisability then dipole-induced dipole effects are non existent.…”

Section: Introductionmentioning

confidence: 99%

The second virial coefficient of the dipolar two center Lennard-Jones modelElectronic supplementary information (ESI) available: computer programs and ancillary data. See http://www.rsc.org/suppdata/cp/b2/b200781a/

Vega

McBride

Menduiña

2002

Phys. Chem. Chem. Phys.

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The second virial coefficients of two-center Lennard-Jones molecules which contain an embedded point dipole have been determined via numerical integration. A number of models with different reduced bond lengths and dipole moments have been considered. For each model the second virial coefficient has been calculated for a number of temperatures. It is shown that the presence of the dipole moment significantly raises the Boyle temperature and, for a given temperature, reduces the value of the second virial coefficient with respect to the non-polar model. It is shown that the model can describe correctly the second virial coefficient of some refrigerants.y Electronic supplementary information (ESI) available: computer programs and ancillary data. See

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Section: Introductionmentioning

confidence: 99%

The second virial coefficient of the dipolar two center Lennard-Jones modelElectronic supplementary information (ESI) available: computer programs and ancillary data. See http://www.rsc.org/suppdata/cp/b2/b200781a/

Vega

McBride

Menduiña

2002

Phys. Chem. Chem. Phys.

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“…Several studies of the thermophysical properties of R143a have been reported since the early work of Russell et al (1944). Beckermann and Kohler (1995) derived the second virial coefficients, B, and ideal gas heat capacities, C°p, from acoustic measurements; Gillis (1996) also used acoustic measurements to derive the second and third virial coefficients, B and C, and C°p; Kohler and Van Nhu (1993) calculated B using a potential model incorporating dipole moments; Bignell and Dunlop (1993), Zhang et al (1995), and Giuliani et al (1995) reported virial coefficients derived from PVT measurements. In addition, Russell et al, Zhang et al, Giuliani et al, Fukushima (1993), Wang et al (1993), and Widiatmo and Watanabe (1994) reported vapor pressure measurements.…”

Section: Introductionmentioning

confidence: 99%

Vapor Pressures and PVT Properties of the Gas Phase of 1,1,1-Trifluoroethane

Weber

Defibaugh

1996

J. Chem. Eng. Data

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A Burnett/isochoric PVT apparatus and a metal ebulliometer have been used to measure the gas-phase PVT surface and vapor pressures of 1,1,1-trifluoroethane (R143a). The PVT measurements spanned the temperature range 276 K to 373 K at pressures up to 6.6 MPa (densities to 6 mol·dm-3). A virial surface is given which represents the data up to a density of 3.5 mol·dm-3. Formulations are given for the second and third virial coefficients. Vapor pressure measurements spanned the temperature range 236 K to 343 K. Thermodynamic calculations were used to extend the range down to a temperature of 180 K, and an equation is given which represents the vapor pressure curve from 180 K to the critical temperature. The temperature of the normal boiling point was found to be (225.90 ± 0.01) K. Comparisons are made with other published results for R143a.

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“…where B h is the second virial coefficient of the hard body and ,u* is the reduced dipole moment [4]. This relation is restricted to nonassociated fluids.…”

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confidence: 99%