Measurements of The Thermodynamic Properties of HCFC 142b

This paper reports thermodynamic properties of HCFC 142b, i.e., vapor pressures, the critical pressure, PVT properties, and saturated points in a wide range of temperatures from 297 to 443 K, of pressures from 0.3 to 9.4 MPa, and of densities from 71 to 970 kg/m³, respectively. For HCFC 142b 139 vapor pressure and PVT measurements have been accomplished along 17 isochores. The uncertainties of temperature, pressure, and density measurements are less than ±10 mK, ±3.0 kPa, and ±0.1%, respectively. On the basis of the experimental measurements along each isochore, we have determined 7 saturated points (4 saturated liquid and 3 saturated vapor points), and the critical pressure of HCFC 142b. We have also developed a vapor pressure correlation originated from our 69 vapor pressure measurements and compared it with other vapor pressure data and correlations for HCFC 142b. We have also compared our results with saturated liquid density measurements and correlations reported by other investigators.