Max Phases in Binary Mixture EQ: Gibbs Phase Rule

[hgnk708113]

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

 

[hgnk708113]

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?

 

[insightful]

It says binary mixture but does it mean there are 2 component(C=2)?

Yes, that's what it means.