Max Phases in Binary Mixture EQ: Gibbs Phase Rule

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The discussion centers on determining the maximum number of phases in a binary mixture at equilibrium using the Gibbs phase rule, represented by the equation F=C-P+2. Participants clarify that for a binary mixture, the number of components (C) is 2. The calculations suggest that if C=2, the maximum number of phases (P) can be 4, while if one mole fraction is known (C=1), the maximum phases would be 3. Ultimately, the consensus is that for a binary mixture, the maximum number of phases is indeed 4. Understanding the correct application of the Gibbs phase rule is crucial for solving such problems.
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Homework Statement


Acording to the Gibbs phase rule, what is the maximum number of phases that one may observe for a binary mixture in equilibrium?

Homework Equations


phase rule
F=C-P+2

The Attempt at a Solution


It says binary mixture but does it mean there are 2 component(C=2)?
I think we can know one mole fraction and we can know another so C=1
I found the answer for this problem is 4 from 0=2-P+2 P=4
but if C=1 0=1-P+2 P=3
 
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Oh I lost some words
I mean if one of the two mole fraction is known and the other is known so C=1
what is the correct answer ? maximum number of phase is 3 or 4?
 
Last edited:
hgnk708113 said:
It says binary mixture but does it mean there are 2 component(C=2)?
Yes, that's what it means.
 
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