And it was supposed that the influence of the pressure on the system is only effect upon the exess molar volume of the system rely on the relationship of Gibbs free enthalpy with the pressure.

This article points out a misconception in physical chemistry "the value of Gibbs function is equal when Binary System of pure substance is in phase balance".

The objective function of total Gibbs free energy of system is linearized to solve the optimality problem by linear programming.