U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Vapor-Liquid Equilibrium, Coexistence Curve, and Critical Locus for Pentafluoroethane +1,1,1,2-Terafluoroethane (R-125+R-134a)

Published

Author(s)

Yukihiru Higashi

Abstract

The vapor-liquid equilibrium for pentafluoroethane +1,1,1,2-tetrafluoroethane (R-125 +R-134a) was measured by the static method in the temperature range between 283 and 313K. The vapor-liquid coexistence curve near the critical point was measured by the observation of the meniscus disappearance. The critical temperatures and critical densities of a 30 mass% R-125 and 70 mass% R-125 mixture were determined from the saturation densities along the coexistence curve in the critical region. In addition, the critical locus for the R-125+R-134a mixture is correlated as the function of composition.
Citation
Journal of Chemical and Engineering Data
Pub Type
Journals

Keywords

coexistance curve, critical locus, HFC refrigerants, R-125+R-134a mixture, REFPROP 6.0, saturated density vapor-liquid

Citation

Higashi, Y. (2008), Vapor-Liquid Equilibrium, Coexistence Curve, and Critical Locus for Pentafluoroethane +1,1,1,2-Terafluoroethane (R-125+R-134a), Journal of Chemical and Engineering Data (Accessed April 24, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created October 16, 2008