Excess Enthalpies of Liquid Alkane Mixtures at Pressures up to 500 bar. II. Extension and Application of a Molecular Theory

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Abstract
The Prigogine‐Flory‐Patterson‐Theory and its applicability in predicting thermodynamic excess properties is tested. In particular the experimentally determined dependence of the excess enthalpyHEon pressure of some binary alkane mixtures is used in this investigation. A consistent description of the experimental results is only possible using a modified form of this theory, which accounts for the short range order observed for n‐alkanes. The development of the extended theory is presented and the new insight possible into the molecular structure of the liquids and their mixtures under investigation is discussed.

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