Specific heat of liquids from the correspoпdiпg states priпciple

It is shown by analysis of data in the literature that the excess molar heat capacity of normal (nonassociated) liquids on the saturation curve is described by a single function of the reduced temperature and the defining criterion of thermodynamic similarity. Formulas approximating this function are given for the isobaric and isochoric specific heat. We examine the use of these principles for evaluating the specific heat of liquids.