Abstract
Abstract By means of the cell method and using the Sutherland type potential function for pair interactions between molecules, a statistical theory was formulated for binary liquid mixtures consisting of rigid spherical molecules differing in size. A formula was derived for cohesive energy as a function of the volume of liquid, and studied in combination with the radial distribution function. The applicability of the square-well type potential function within a cell was also examined. Formulas for excess thermodynamic functions were derived and their applicability investigated. For 22 binary systems consisting of nearly spherical molecules, excess thermodynamic functions were calculated and compared with data in literature. The results show that the theory is applicable to the mixtures.
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