Vapor pressures, gas-phase PVT properties, and second virial coefficients for 1,1,1-trifluoroethane

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Journal of Chemical and Engineering Data

DOI:https://doi.org/10.1021/je00020a033· OSTI ID:94347

Zhang, H L; Sato, Haruki; Watanabe, Koichi ^[1]

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1. Keio Univ., Yokohama (Japan)

The PVT properties of 1,1,1-trifluoroethane (R-143a) in the gas phase have been measured by a Burnett apparatus in the range of temperatures from 320 to 380 K and at pressures up to 6 MPa. The vapor pressures in the range of temperatures from 295 to 342 K have also been measured, and a vapor-pressure correlation has been developed. The critical pressure was determined to be (3.776 {+-} 0.005) MPa on the basis of the present measurements. The second virial coefficients have been determined along seven isotherms, and a truncated virial equation of state has also been developed to represent the temperature dependence of the second virial coefficients and the present Burnett PVT measurements. The experimental uncertainties of temperature, pressure, density, and second virial coefficient throughout the present study were estimated to be no more than {+-} 8 mK, {+-} 0.8 kPa, {+-} 0.12%, and {+-} 5%, respectively. The purity of the R-143a sample used was better than 99.95 mol %.

• Sponsoring Organization: USDOE
• OSTI ID: 94347
• Journal Information: Journal of Chemical and Engineering Data, Journal Name: Journal of Chemical and Engineering Data Journal Issue: 4 Vol. 40; ISSN JCEAAX; ISSN 0021-9568
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
CHLOROFLUOROCARBONS
CRITICAL PRESSURE
EQUATIONS OF STATE
EXPERIMENTAL DATA
FLUORINATED ALIPHATIC HYDROCARBONS
MATERIAL SUBSTITUTION
OZONE LAYER
REFRIGERANTS
THERMODYNAMIC PROPERTIES
VAPOR PRESSURE