Solutions Question 309

Question: PA and PB are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution. If XA represents the mole fraction of component A, the total pressure of the solution will be.

Options:

A) PA+XA(PB−PA)

B) PA+XA(PA−PB)

C) PB+XA(PB−PA)

D) PB+XA(PA−PB)

Show Answer

Answer:

Correct Answer: D

Solution:

P=PAXA+PBXB

=PAXA+PB(1−XA)
⇒PAXA+PB−PBXA
⇒PB+XA(PA−PB)

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