The mixture is stable and forms one liquid phase.
Consider the figure that provides the molar Gibbs free energy of mixing as a function of composition for a binary mixture.
If the overall composition of the mixture is 20% of component 1, is the mixture stable? If not, what are estimates of the compositions of the liquid phases that are in equilibrium?
Correct. The point on the curve at x1 = 0.2 is not between the compositions where the tangent line touches the curve.
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