Surface energy of liquids and melts

Estimation of surface tension of liquids from related properties 

Since the surface tension is a manifestation of intermolecular forces, it may be expected to be related to other properties derived from intermolecular forces, such as internal pressure, compressibility and cohesion energy density. This is found to be so indeed. In the first place there exists a relationship between compressibility and surface tension. According to McGowan (1967) the correlation is  

Another interesting empirical relationship, viz. between surface tension and solubility parameter, was found by Hildebrand and Scott (1950)  

This relationship was examined by Lee (1970) with 129 non-polar and polar liquids. Lee proved that 65% of liquids obey the equation, the major discrepancy being caused by the molar volume term in the case of hydrogen-bonded liquids. 

2) indicates a relationship between surface tension, cohesive energy and molar volume. A quantitative and dimensionally correct relationship between these quantities has been derived by Grunberg and Nissan (1949). For compounds of low molecular weight they defined a quantity Wcoh, called work of cohesion  

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