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The vapour pressure of two pure liquids A nd B that forms an ideal soln. is 300 and 800 torr. respectively at temperature T. A mixture of the vapours of A and B for which the mole fraction of A is 0.25 is slowly compressed at Temperatur T.Calculate: 1.The composition of the first drop of the condensate:- a.8/17,9/17 b.4/13,7/13 2.The total pressure when this drop formed:- a.475 torr .b.565 torr 3.The composition of the solution whose normal boiling Point is T: a.0.4,0.6 b.0.08,0.92 The pressure when only the last bubble of vapour remains. a. 765 torr c.675 torr

The vapour pressure of two pure liquids A nd B that forms an ideal soln. is 300 and 800 torr. respectively at temperature T. A mixture of the vapours of A and B for which the mole fraction of A is 0.25 is slowly compressed at Temperatur T.Calculate:


1.The composition of the first drop of the condensate:-


a.8/17,9/17   b.4/13,7/13


2.The total pressure when this drop formed:-


a.475 torr .b.565 torr


3.The composition of the solution whose normal  boiling Point is T:


a.0.4,0.6      b.0.08,0.92


The pressure when only the last bubble of vapour remains.


a.  765 torr  c.675 torr

Grade:12

1 Answers

SAGAR SINGH - IIT DELHI
879 Points
11 years ago

Dear student,

Use the formula,

Po-P/Po=n2/n1

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Sagar Singh

B.Tech, IIT Delhi

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