Question - 2.8 - The vapour pressure of pure liquids A and B are 450 and 700 mm Hg respectively, at 350 K . Find out the composition of the liquid mixture if total vapour pressure is 600 mm Hg. Also find the composition of the vapour phase.
For liquid A and B,
From Rault❜s Law,
Now, In vapour phase,
Mole fraction of liquid A
And mole fraction of liquid B
Thus, composition in liquid phase, is 0.4 and 0.6
And that in vapour phase, is 0.3 and 0.7