Solutions - Intext Questions and Answer - class 12 chemistry

Solution of NCERT In Text Questions-2.8

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.

Solution:

Given,

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

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