THERMODYNAMICS OF ALKANOL ALKANE SYSTEMS - NEW MODIFICATIONS OF THE ERAS MODEL

A new modification of the ERAS model, which is widely used to describe thermodynamic properties of alcohol-alkane systems, has been proposed . Its necessity results mainly from the observation that the original model is not able to reproduce excess heat capacity data. It is based on a different formulation of the so-called chemical contribution to t he model. The refined approach has been tested through correlation and prediction of excess heat capacities, excess enthalpies, excess volum es, excess Gibbs energies and also the spectroscopic properties, givin g results better, or not worse, than the original ERAS model.