Phase Equilibria or Phase Equilibrium
Equilibrium existing between tow or more different phases is heterogeneous in nature and behavior of such an equilibrium can be studied by one rule called “Phase Rule”. This rule was deduced by Willard Gibbs in 1876. Mathematically,
F + P = C + 2
Where F is number of degree of freedom, P is number of phases and C is number of the components.
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