Thermodynamic characteristics of self-associated solvents

The thermodynamic characteristics of solvents differing by the type of molecular self-assembly through the hydrogen bonds were considered. In the framework of a model approach specific and nonspecific components of the total energy of intermolecular interaction were identified. The solvents with hydrogen bond network are found to belong to a class of liquids, where the strength of non-specific interactions increases with increasing temperature, while in the solvents with a chain of self-association contribution of these interactions is virtually independent of temperature. For this reason, the effect of increasing temperature on the internal pressure and its temperature coefficient were found to be different in these groups of solvents.