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I understand determining conditions of equilibrium for a unary system; each of the separate phases can be treated as a one-phase system with its own set of extensive and intensive properties. However, I am having difficulty understanding multi-component systems. Despite the addition of more components, would it be the similar to a unary system, in that for the system to come to equilibrium, the temperature, the pressure, the chemical potential of each component must be the same in all of the phases?

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    $\begingroup$ See: Gibbs Phase Rule $\endgroup$
    – A.K.
    Dec 17 '21 at 2:03
  • $\begingroup$ Yes, that is the requirement for thermodynamic. equilibrium of a multicomponent multiphase system. $\endgroup$ Dec 17 '21 at 11:31

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