IMPROVEMENTS OF THE PATEL-TEJA EQUATION OF STATE

The Patel-Teja equation of state has been improved by modifying the te mperature dependence of the attractive term to give simultaneous repre sentation of vapor pressure, liquid density, and liquid heat capacity data for polar and nonpolar compounds. For many high-boiling industria lly important compounds, the combination of available heat capacity an d vapor pressure data provides a thermodynamically sound method of est ablishing the temperature dependence of the attractive term in the mos t practical range of 273-523 K. The performance of the equation of sta te is greatly improved if the critical pressure is used as the adjusta ble parameter to correlate the thermodynamic properties under the cond itions of interest.