Statistical-Mechanical Calculation of Surface Properties of Simple Liquids and Liquid Mixtures. II. Mixtures

Abstract

Calculation of density transition curves and surface tension in a series of mixtures of argon and nitrogen at 84°K are presented. The densities of the two components as a function of position in the interface furnish insight in the structure of the transition region and predict certain features in regard to the (excess) surface tension, which are confirmed experimentally. The calculated values of surface tension as a function of liquid mole fraction are in satisfactory agreement with experiment. Certain problems pertaining to the numerical solution of simultaneous nonlinear integral equations are discussed.