Influence of the geometric factor on the volume properties of triple mixtures

Abstract

For model mixtures it is established that the concentration behavior of the molar volume that obeys the additive rule with respect to mole fraction is explained by the difference in geometric structures of pure liquids constituting mixture. It is revealed that the geometric factor (the difference in volumes of molecules and packing densities of the initial liquids constituting mixture) brings significant contribution to the excess molar volume of water mixtures of nonelectrolytes. Within the framework of the suggested approach, a maximum contribution of this factor to the relative excess volume of triple mixtures is estimated.