Gibbs energy change of mixing

Figure 13.14 Gibbs energy change of mixing. Curve 1, complete miscibility curve 11, two exist between A and B.

The Gibbs energy change of mixing AG is always negative. 

In a similar way the Gibbs energy change of mixing may be derived. Integration of the corresponding equation in Table 2.1 gives... 

Figure 4.3 The Gibbs energy change of mixing, the ideal Gibbs energy change of mixing, and Gibbs excess energy for the system ethanol-water at 70 C in the liquid phase.

The thermodynamic functions of a solution are usually expressed in terms of the quantities of mixing. These quantities are defined as the change in the variable for producing the solution from the unmixed components at the same temperature and pressure. The Gibbs energy change of mixing is... 

This equation is identical to that for the Gibbs energy change of mixing of an ideal gas mixture. 

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