The virial coefficients of five binary mixtures of fluorinated methanes and ethanes

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · International Journal of Thermophysics

DOI:https://doi.org/10.1007/BF01447099· OSTI ID:56868

Weber, L A; Defibaugh, D R ^[1]

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1. National Institute of Standards and Technology, Gaithersburg, MD (United States)

We have made new measurements of the gas-phase PVT surface of five binary mixtures of hydrofluorocarbons (HFCs) in a Burnett/isochoric apparatus. The components chosen all have moderate to large reduced dipole moments. We present PVT data, derived mixture virial coefficients, cross second virial coefficients, and binary interaction parameters for these systems, and we compare the results with a recently published model for calculating second and third viral coefficients of polar gases and their mixtures. That model accounts for the polar nature of the molecules with a term containing the reduced dipole moment, {mu}{sub R}, and it contains mixing rules for the substance-specific parameters needed to calculate the second and third cross virial coefficients. The model and data are in satisfactory agreement, and the model can be used to greatly exceed the useful range of the limited set of data.

• Sponsoring Organization: USDOE
• DOE Contract Number: FG02-91CE23810
• OSTI ID: 56868
• Journal Information: International Journal of Thermophysics, Journal Name: International Journal of Thermophysics Journal Issue: 5 Vol. 15; ISSN 0195-928X; ISSN IJTHDY
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BINARY MIXTURES
DIPOLE MOMENTS
EQUATIONS OF STATE
METHANE
MOLECULES
NUMERICAL DATA
REFRIGERANTS
VIRIAL EQUATION