THERMOPHYSICAL BEHAVIOR OF POLAR PLUS NONPOLAR SIMPLE MOLECULAR MIXTURES - AN EXPERIMENTAL-STUDY OF THE ACETONITRILE PLUS BENZENE SYSTEM

The equation of state of acetonitrile + benzene has been measured over the whole composition range and for 298.15 less-than-or-equal-to T/K less-than-or-equal-to 328.15 and 0.1 less-than-or-equal-to p/MPa less-than-or-equal-to 40.0. The pressure dependence of several excess properties has been calculated from the experimental data. The system shows high values of G(E), higher than in other systems formed by benzene with a polar and rigid molecule. The V(E)(x) curves are s-shaped, though \V(E)\ is relatively small. The results have been used to test the predictive capacity of a generalized van der Waals equation (Deiters' one) and a lattice-with-holes model.