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Liquids A and B form an ideal solution i...

Liquids A and B form an ideal solution in the entire composition range. At 350K, the vapour pressures of pure A and B are `9 xx 10^3` Pa and `16 xx 10^3` Pa, respectively. The composition of the vapour in equilibrium with a solution containing 30 mole percent of A at this temperature is:

A

`X_A = 0.2 , X_B = 0.8`

B

`X_A = 0.8 , X_B = 0.2`

C

`X_A = 0.28 , X_B = 0.72`

D

`X_A = 0.72 , X_B = 0.28`

Text Solution

Verified by Experts

`Y_A = (P_A)/(P_("total")) = (P_A^@ X_A)/(P_A^@X_A + P_B^@X_A) = (9 xx 10^3 xx 0.3)/(9 xx 10^3 xx 0.3 + 16 xx 10^3 xx 0.7 )`
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