Using the following T_xydiagram for a benzene-toluene binary mixture at 1 atm, answer the following questions. A liquid mixture of 50 mol% benzene (B) and 50 mol% toluene (T) is heated slowly from 80^oC to 105^oC at a constant pressure of 1 atm.

a) At what temperature is the first bubble formed?

b) What is the mol fraction of benzene in the vapour of this first bubble formed?

c) What is the mol fraction of toluene of the vapour of this first bubble formed?

d) As the mixture is heated further after the first bubble forms, does the composition of the liquid phase become richer in benzene (yes or no)?

e) As the mixture is heated further after the first bubble forms, does the composition of the vapour phase become richer in toluene (yes or no)?

f) At what temperature does the last drop of liquid vapourize?

g) What is the mol fraction of benzene of this last drop of liquid?

h) What is the mol fraction of toluene of this last drop of liquid?

i) In the graph, what is the boiling point of benzene?

j) At the end of the heating process, how many degrees of superheat does the vapour have?