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## Homework Statement

What constraints are imposed on the use of the Gibbs equation Tds = dh - vdP

## Homework Equations

Tds = dh - vdP

## The Attempt at a Solution

I seem to be stuck on this question. So far I have come up with the following constraints, but I'm not even sure if they are correct:

1. The equation holds for only closed systems at constant pressure

2. The equations holds only for systems in which the free energy depends only on P and T.

3. The equation doesn't apply on mixtures or supercooled liquids.