Enthalpy of vaporization of benzene os +35.3 KJ mol-1 at its boilong point 80o C. The enotropy change in the transition of the vapour to liquid at its boiling point (in JK-1 mol-1 ) is
entropy change is given by the formula S=H/T
here H=35.5KJ => H=35.5*1000
also convert T to kelvin=> 80+273=353
.: S=35500/353=100 but this is from vapour to liquid=>-100...i am not very sure about the sign