## Evaluating Entropy (The Tds relations)

That is "**T****edious**",
but without the vowels, of course! Recall from consideration of
the **Clausius Inequality** that
we defined entropy as follows:

### Tables of 2-phase fluid (Steam, R134a)

Notice that all the properties on the right
hand side of this equation T, P, v, u are measurable properties
given in the tables, thus this differential equation can be solved
numerically, leading to the table values of entropy s.

### Liquid (or solid - incompressible)

### Ideal Gas

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Engineering Thermodynamics by Israel Urieli is licensed under a
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