Abstract

The apparatus of equilibrium thermodynamics is used to construct a model of a mean-statistical cluster (a polymolecular associate) in the structure of liquid media, and this model is used to discuss the problems of long-wavelength IR absorption, as well as the vaporization of liquids. Based on the results, a method is proposed that makes it possible to distinguish the dispersion component of the molar enthalpy of vaporization of liquids, and an adequate interconnection is established between it and the frequency of the quasi-lattice translational vibrations of liquids; the concept of the transition of a mean-statistical cluster of liquids to an excited vibrational state as a quasi-phase transition of the first kind is also further developed.

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