The last of this trio of relations is called the Gibbs-Duhem equation. Its extreme importance to solution thermodynamics is the connection it provides between the nonideal behavior of one component with the deviations from ideality of the other components. This property is especially useful for binary systems, and Eq (7.28) will be applied to A-B solutions later in this chapter.
Equations similar to Eqs (7.31) - (7.28) apply to other solution thermodynamic properties: v and vj, u and uj, and s and sj.
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Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.