Corresponding States Treatment of Nonelectrolyte Solutions

Publisher Website
Google Scholar
Abstract
Recent theories of solutions (Prigogine and co‐workers; Salsburg and Kirkwood) use a theory of corresponding states to deduce the properties of solutions from theoretically derived properties of the pure components (e.g., from the Lennard‐Jones and Devonshire ``free volume'' or ``cell'' model). A characteristic of these theories is that they predict for molecules of the same size and dispersion force interactions a negative volume change on mixing. Since the ``cell'' model gives very poor agreement with experimental data on energy‐volume and volume‐temperature relations of pure liquids, a corresponding states treatment has been carried through using an experimental equation of state for the pure liquid. If one assumes two kinds of ``cells'' in the mixture, a type for each of the components, the results agree with experimental data on solutions at least as well as previous theories. As before, contraction on mixing is found for a certain class of dispersion force solutions. In any corresponding states treatment, the entropy of mixing will not be ideal either at constant pressure or at constant volume.

This publication has 22 references indexed in Scilit: