Prediction of various thermodynamic and thermophysical properties of alkali halides

In the framework of the theoretical considerations suggested by Eyring, based on statistical thermodynamics, calculations of reliable values and accurate estimate of surface tension and surface energy of alkali halides are presented. The ratio of surface energy, at melting temperature, of solid and liquid phases is constant for all the alkali halides and is equal to 1.465. Moreover, empirical relations are proposed for calculating the surface tension, the cohesive energy density and the isothermal compressibility. Finally, a promising theoretical equation is obtained for determining the product of the isothermal compressibility and the surface tension. All the results are in very good agreement with the available experimental data with a difference that does not exceed 7% for most of the salts under study. The results provide a good database useful for scientists and engineers.