An equimolar mixture of n-butane and n-hexane at pressure P is brought 10 a temperature of 95C,

Question:

An equimolar mixture of n-butane and n-hexane at pressure P is brought 10 a temperature of 95°C, where it exists as a vapor/liquid mixture in equilibrium. If the mole fraction of n-hexane in the liquid phase is 0.75, what is pressure P (in hart, what is the molar fraction of the system that is liquid, and what is the composition of the vapor phase?