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《Journal of North China University of Technology》 1988-02
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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.
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