Abstract

Reassessing the previously found linear correlation between the latent heat of vaporization and the Raman spectra for hydrocarbons; it has been found that smooth connections exist also for diatomic and monatomic liquids. This finding permits: First, to state that the dimensionless inequality set: ▪ introduces corresponding liquid groups, out of which the special case when hcv/kT B = 1.0 defines a class of liquids for which the well-known Trouton's rule is valid. Secondly, the presented findings have in more general manner confirmed the previously established thought that there is need to study the evaporation process in terms of the excited frequencies and the quantum theory of the intermolecular forces of the liquid.

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