Question

drive the expression for phase rule
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Answer 1

Answer:

The phase rule is a general principle governing "pVT systems" in thermodynamic equilibrium, whose states are completely described by the variables pressure (p), volume (V) and temperature (T). If F is the number of degrees of freedom, C is the number of components and P is the number of phases, then[1][2]

{\displaystyle F=C-P+2.}

Answer 2

Answer:

The number of equilibria for each P phases for each component is P – 1. For C components, the number of equilibria for P phases is P ( C – 1). The obtained formula is the Gibbs phase rule.