Derived Properties of Surface Tension for Hard Sphere Liquids from an Equation of State

Analytical expressions for surface tension, derived by using the equation of state from the scaled particle theory and that from sound propagation through liquids, have boon subjected to arrive at Eotvos constant and compressibility coefficient by forming the derivatives of surface energy and pressure coefficient of surface tension respectively. It is gratifying to note that value so obtained are in fair agreement with experiment, especially when it is noted that they are obtained as the second derivatives of Helmholtz free energy