A solution containing `0.1` mole of naphthalenen and `0.9` mole of benzenen is cooled out until
Channel: Doubtnut
Date: 12/04/2020

A solution containing `0.1` mole of naphthalenen and `0.9` mole of benzenen is cooled out until some benzene freezes out. The solution is then decanted off from the solid and warmed upto `353K` where its vapour pressure was found to be `670` torr. The freezing point and and boiling point of benzene are `278.5K` and `353K` respectively and its enthalpy of fusion is `10.67 Lk "mol"^(-1)`. Calculate the temperature to which the solution was cooled originally and the amount of benzene that must have frozen out. Assume ideal behavious.