Vapor-liquid coexistence curves in the critical region and the critical temperatures and densities of 1,1,1,2-tetrafluoroethane (R-134a), 1,1,1-trifluoroethane (R-143a), and 1,1,1,2,3,3-hexafluoropropane (R-236ea)

Journal Article · Sun Sep 01 00:00:00 EDT 1996 · Journal of Chemical and Engineering Data

DOI:https://doi.org/10.1021/je960077w· OSTI ID:378018

Aoyama, H; Kishizawa, G; Sato, H; Watanabe, K ^[1]

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1. Keio Univ., Hiyoshi, Yokohama (Japan)

The vapor-liquid coexistence curves in the critical region of 1,1,1,2-tetrafluoroethane (R-134a), 1,1,1-trifluoroethane (R-143a), and 1,1,1,2,3,3-hexafluoropropane (R-236ea) were measured by a visual observation of the meniscus disappearance in an optical cell. Seventeen saturated-vapor and -liquid densities have been measured for R-134a. Thirty-five saturated-vapor and -liquid densities have been measured for R-143a. Twenty-seven saturated-vapor and -liquid densities have been measured for R-236ea. The level and location of the meniscus, as well as the intensity of the critical opalescence were considered in the determination of the critical temperature and density for each fluid. R-134a was found to have (374.083 {+-} 0.010) K and (509 {+-} 1) kg/m{sup 3}, R-143a, (345.860 {+-} 0.010) K and (434 {+-} 1) kg/m{sup 3}, and R-236ea, (412.375 {+-} 0.015) K and (568 {+-} 1) kg/m{sup 3}.

• OSTI ID: 378018
• Journal Information: Journal of Chemical and Engineering Data, Vol. 41, Issue 5; Other Information: PBD: Sep-Oct 1996
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
40 CHEMISTRY
REFRIGERANTS
THERMODYNAMIC PROPERTIES
CRITICAL TEMPERATURE
DENSITY
CHLOROFLUOROCARBONS
MATERIAL SUBSTITUTION
OZONE LAYER
MEASURING METHODS
EXPERIMENTAL DATA