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  • Answer please! 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.

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.

  • Option 1)

    PA + XA ( PB - PA)

  • Option 2)

    PA + XA (PA - PB)

  • Option 3)

    PB + XA (PB - PA)

  • Option 4)

    PB + XA (PA - PB)

 

Answers (2)

best_answer

Vapour pressure of A = X_{A}P_{A}

B=X_{B}P_{B}

=\left ( 1-X_{A} \right )P_{B}

Total pressure = vapour pressure of A+ vapour pressure of B

=X_{A}X_{A}+\left ( 1-X_{A} \right )P_{B}

=P_{B}+X_{A}\left ( P_{A}-P_{B} \right )


Option 1)

PA + XA ( PB - PA)

Incorrect option

Option 2)

PA + XA (PA - PB)

Incorrect option

Option 3)

PB + XA (PB - PA)

Incorrect option

Option 4)

PB + XA (PA - PB)

Correct option

Posted by

prateek

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This solution is wrong there is one small correction in answer..in place of Pa-Pb you should write pb-Pa.

Hope you understand

 

Posted by

Asim abbas Sunasara

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