Gibbs phase rule

Definition of Gibbs phase rule from the PharmacyDictionary.in

Gibbs phase rule

Quantitative expression for the number of degrees of freedom (F) or variables that must be controlled (or determined) in a system in order to completely define it; F equals the number of components © less the number of phases (P) in a system plus 2, or F = C – P + 2.

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