Discussion on the Degree of Freedom of Two-component Azeotropic Systems
Shi Chaoren(Department of Fundamental Sciences)
A phase rule of system with special limiting condition expressing by formula f=K-φ-R~＊+2(R~＊ is the number of special limi- ting condition ) is proposed. The relationship [X_2~(l)=X_2~(g)]between the same concentration of both liquid and vapor phase in two-component azeotropic system should be considered as a special limiting condition rather than concentration-dependent limiting condition. By application of the formula indicated and special limiting condition, the conclusion of only one degree of freedom with two-component azeotropic system can be obtained.