Symmetric Ideal Solutions Necessary and Sufficient Conditions

SYMMETRIC IDEAL SOLUTIONS NECESSARY AND SUFFICIENT CONDITIONS 

In Section 4.4 we showed that in a mixture of very similar components, the chemical potential of each component has the form 

In this section, we confine ourselves to treatment of mixtures of two components A and B, characterized by the thermodynamic variables T, P, 

A symmetric ideal (SI) solution is defined as a solution for which the chemical potential of each component obeys relation (4.90) in the entire range of compositions, keeping T, P constant, i.e., 

Clearly, from the requirement that (4.91) hold in the entire range of com- 

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