Question

Why does 40% cyclohexane, 60% toluene have a different boinling point than 60% cyclohexane and 40% toluene?

Answer 1

Cyclohexane boiling point = 81 °C and Toluene boiling point = 110.6 °C.

Thus, cyclohexane 40% and toluene 60% create a new solution which has a different boiling point than a mixture of toluene 60% and cyclohexane 40%.

Because both have a different boiling point and both compositions are different. Thus their inherent mature are different.

The second composition have a higher boiling point than the former one.