Vapor Pressure and Gas Phase P−V−T Data for 1,1,1,3,3-Pentafluoropropane (R-245fa)

Abstract

A constant-volume apparatus was used to measure the vapor pressure and single phase properties (P−V−T) for 1,1,1,3,3-pentafluoropropane (R-245fa), an ozone-friendly refrigerant. The measurements were done from 265 K to 367 K and at pressures from 35 kPa to 610 kPa. The 51 experimental points taken for the vapor pressure region were fitted with the Antoine equation. The 32 experimental P−V−T measurements in the superheated vapor region taken along four isochores were regressed to the virial equation of state in the Leiden form truncated after the second term. Consistency of the derived second virial coefficients was shown with the Tsonopoulos and Weber correlating methods. The experimental results were also compared with the few data available in the literature.