APPLICATION OF FLUCTUATION SOLUTION THEORY TO THERMODYNAMIC PROPERTIES OF SOLUTIONS

Fluctuation Solution Theory connects certain thermodynamic partial der ivatives to integrals of molecular correlation functions from statisti cal mechanics. This paper describes some applications of this method f or correlating and predicting properties of solutions of chemical engi neering interest. The method has been used for three kinds of practica l systems: A) the densities and compressibilities of liquids; B) the d ensities and phase equilibria of supercritical substances with liquids ; and C) the densities and activities of aqueous electrolytes. The pap er illustrates the method for these cases and gives recent results.