Significant structure theory applied to phase separation

Abstract

The significant structure theory of liquids has been applied to the partially miscible system of the $O_3-O_2$ mixture which exhibits partial miscibility in the temperature range from -195.5 ℃ to -179.9 ℃. The thermodynamic condition for phase separation is the following equation: ◁수식 삽입▷(원문을 참조하세요) The partition function of the binary liquid mixture are constructed in a manner that random mixing is assumed and the whole form of the partition function of the mixture is like the one-fluid form and the parameters appearing in this theory are used like the equation originally proposed by van der Waals. We calculated the coexistence curve of the $O_3-O_2$ varing the molefractions to find the temperature at which two liquids are separated. The agreement between the theory and experiment is quite satisfactory.