SATURATED LIQUID DENSITY OF 1,1-DIFLUOROETHANE(R 152A) AND THERMODYNAMIC PROPERTIES ALONG THE VAPOR-LIQUID COEXISTENCE CURVE

Saturated liquid densities of 1,1-difluoroethane(CH//3CHF//2) are measured at temperatures from 223 K to 363 K with the estimated uncertainty of 0. 2% by magnetic densimetry. The experimental results are compared with the available experimental data and some correlations and equations of state. A simple correlation for the saturated liquid density is developed as a function of temperature. This correlation covers the temperature range up to the critical point which reproduces the present experimental results with the percent mean deviation of 0. 11%. Adding the available experimental data with respect to the vapor pressure, critical parameters, saturated vapor density, and the second virial coefficient to the present saturated liquid density data, the parameters of the Redlich-Kwong-Soave equation of state are determined and the thermodynamic properties along the vapor-liquid coexistence curve are derived.