Gibbs phase rule flat interfaces

Example 1.9 Gibbs phase rule (flat interface) Derive the phase rule F = c + 2 — p, where Fis the number of degrees of freedom, c is the number of components, and p is the number of phases. Assume the interface between the... 

Example 2.9 Gibbs Phase Rule for curved interfaces Deri ve the phase ru 1 e for a composite system of p phases and c components with curved interfaces F = c + l where F is the number of degrees of freedom. If some of the interfaces are flat, then F = c + 1 — I, w here 7 is the number of flat interfaces between the bulk phases. 

Solution The Gibbs Phase Rule for a fiat interface between the phases, which W as established in Example 1.9 of Chapter 1, is based on the assumption that the PdV work is the only mode of work. As W c have seen in this chapter, the equilibrium conditions for systems with curved interfaces and under the influence of gravity are different from the equilibrium conditions of systems with flat interfaces and negligible gravity. For systems with curved interfaces and also with gravity effect, the Gibbs Phase Rule should be modified. In this example, we will only consider the effect of the curved interface. 

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See also in sourсe #XX -- [ ]

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