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Which of the following statements about ...

Which of the following statements about the composition of the vapour over an ideal `1:1` mol mixture of benzene and toluene is correct? Assume that the temperature is constant at `25^(@)C`. (Given: vapour pressure Date at `25^(@)C`, benzene=12.8 kP, toluene=3.85 kPa)

A

The vapour phase will contain equal amounts of benzene and tollutene.

B

Not enough information is given to make a predication.

C

The vapour phase will contain a higher precentage of benzeene.

D

The vapour phase will contain a higher percentage of toluene.

Text Solution

Verified by Experts

The correct Answer is:
c
`P_("Benzene")=X_("Benzene")xxP_("Benzene")^(@)`
=`1//2xx121.8 k Pa`
`P_("tonene")=X_("toluene")xxP_("toluene")^(@)`
=`1//2xx3.85=1.925kPa`
Since `P_("Benzene")` is more than that of toluene the vapour phses will ciontain higher percentage of benzene
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