Abstract
The Prigogine-Flory theory of solution thermodynamics has been used to interpret molar excess volume data, VE, for two series of alkane mixtures: the five isomers of hexane mixed with normal hexadecane (Data from Reeder, et al.) and the five hexane isomers mixed with a highly branched hexadecane isomer, 2,2,4,4,6,8,8-heptamethylnonane (this work). Values of VE are negative and similar for both series, but vary considerably with the hexane within a series. According to the theory, VE contains a ‘P* contribution’ not found in the excess enthalpy and entropy, which depends strongly on the internal pressures and the derived P* parameters of the components. Values of VE are well predicted for both series, the variation of VE corresponding to the different internal pressures or P* parameters of the hexanes.
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Van Tra, H., Patterson, D. Volumes of mixing and theP * effect: Part I. Hexane isomers with normal and branched hexadecane. J Solution Chem 11, 793–805 (1982). https://doi.org/10.1007/BF00650519
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DOI: https://doi.org/10.1007/BF00650519