Prediction of Infinite Dilution Activity Coefficients in Binary n-Alkane Mixtures

Abstract

The Janini–Martire modification of Prigogine's theory of chain molecule mixtures is further tested via a comparison of predicted infinite dilution activity coefficients (γ∞1) and currently available experimental values. The systems included cover a wider range of molecular size ratios and of temperature than heretofore considered. The extent of agreement is within experimental certainty but as previously noted, Orwoll–Flory theory predicts values which are consistently slightly lower. Both theories, however, predict the same relative values of γ∞1 for any solute with a series of n-alkane solvents. The success of these theories for binary systems is regarded as adequate to provide a good basis for their extension to ternary n-alkane systems for which a surprisingly simple empirical relationship has recently been identified.