INTERNAL-PRESSURE AND SOLUTION THEORY FOR NONELECTROLYTES

A theory of nonathermal solutions for nonelectrolytes has been establi shed by a thermodynamic method. This theory does not contain any adjus table parameters. The excess Gibbs free energy of liquid mixtures can be predicted by properties of pure components which are related to the ir internal pressure. The excess enthalpy and entropy can also be calc ulated, if the volume of liquid mixture is known. The results of predi ction show that the agreement with experimental values prevails over t hat by the Scatchard-Hildebrand theory of regular solutions and its mo dified version, SHFH theory for most of thirty-seven binary systems.