Fundamental thermodynamic property relations for a fluid of constant
composition are as follows:
Criterion of exactness for a differential expression:
If , then the total differnential of F is defined as
Otherwise,
where, and
By further differentiation, we obtain
Since the order of differentiation in mixed second derivatives is
immaterial, these equations give
Equation VI serves as a criterion of exactness, when F is a
function of x & y
Last Modified on: 01-May-2024
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