1.

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)

Answer»

<P>The vapour phase will contain EQUAL AMOUNTS of benzene and tollutene.
Not enough information is given to make a predication.
The vapour phase will contain a higher precentage of benzeene.
The vapour phase will contain a higher PERCENTAGE of toluene.

Solution :`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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