HIGH-PRESSURE BEHAVIOR OF LIQUIDS REFERRED TO A PSEUDOSPINODAL CURVE - EXTENSION TO MIXTURES

We have recently shown that the high-pressure behavior of the isotherm al compressibility, kappa(T), and the thermal expansion coefficient, a lpha(p), can be characterized for molecular liquids from low-pressure measurements of these quantities together with surface tension data. T he quality of the estimation was good enough to characterize the press ure behavior of the molar volume using a reference volume measured und er orthobaric conditions. The same scheme is used here to predict the molar volume of some binary mixtures at different compositions as a fu nction of pressure. Agreement with experimental data is good enough to predict the high-pressure behavior of the molar excess volume.