Collect. Czech. Chem. Commun. 1982, 47, 3171-3176

Representation of binary excess enthalpy data

Miloslav Prchal, Vladimír Dohnal and František Veselý

Department of Physical Chemistry, Prague Institute of Chemical Technology, 166 28 Prague 6


An extensive test of five correlation relations for the concentration dependence of excess enthalpy of non-electrolyte solutions was carried out. The Redlich-Kister, root and reciprocal expansions, the SSF and Wilson equations were used to represent experimental data of 54 systems of different character. For the representation of data of symmetric and slightly asymmetric systems, we recommend the Redlich-Kister polynomial, more asymmetric systems are described excellently by the SSF equation.