PVT AND VAPOR-PRESSURE MEASUREMENTS ON 1,1-DICHLORO-2,2,2-TRIFLUOROETHANE (HCFC-123)

A complete set of PVT properties, vapor pressures, and critical parameters of 1,1-dichloro-2,2,2-trifluoroethane (HCFC-123) were measured by a constant-volume method. Values of 134 PVT property data were obtained along 19 isochores in a range of temperatures from 311 to 523 K, pressures from 0.5 to 12 MPa, and densities from 95 to 1440 kg.m-3, respectively. Results for 68 vapor pressures were obtained at temperatures from 308 K to the critical temperature, while a vapor pressure correlation representing the experimental data within +/- 0.26% was developed. The critical pressure was determined as 3.6655 +/- 0.0030 MPa in the course of developing the vapor pressure correlation. The uncertainties of measurements are less than +/- 10 mK in temperature, +/- 2 kPa in pressure, and +/- 0.01 to +/- 0.14% in density, respectively. The purity of samples used was 99.8 and 99.82 wt %.