Abstract
The thermodynamic properties of a number of binary mixtures, differing from hard sphere nature, have been investigated (72) by utilizing a rigid sphere model first proposed by Longuet-Higgins and Widom (5). Values of excess Gibbs energy for equimolar mixtures are usually forced to agree with experimental values at one temperature to fix necessary parameters. In principle, the precise measurement of excess volume can provide a more direct and possibly more acceptable procedure for determining the fitting parameters involved in the hard sphere model considered. In addition, the excess volume is readily measured. From this point of view, the determination of the excess volumes for three binary mixtures was carried out. The results of the measurements for the systems benzene-mesitylene, benzene-carbon tetrachloride, and carbon tetrachloridemesitylene at 27 and 40°C are given along with a description of a simple method for the determination of excess volumes.
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