Surface Tension of Liquids

Abstract

Surface tension of liquid is treated by the method of statistical mechanics. By assuming that molecules, which are on the first and second layers from the surface. share free volume while no sharing of free volume exists for inner molecules, temperature dependence of surface tension is calculated theoreticaily and a formula very similar to that of Eotvos is derived. The formula here derived is
σ=U-2•10/V^2/3T,
where σ is the surface tension measured in dynes_??_cm, U the surface energy in ergs cm² and V the molal volume in cm². Calculated values of surface tensions of several simple liqunis are in fairly good agreement with experiment