The enthalpy of vaporization of benzene is +35.3 ~kJ / mol at its boiling point, 80^ C . The entropy change in the transition of vapour to liquid at its boiling point is

Step-by-step solution

aligned H &=+35.3 ~kJ / mol T &=80^ C =80+273=353 ~K S &= H T = +35.3 353 =0.1 ~kJ / mol / K S &=0.1 10³=100 ~J / mol / K aligned Entropy change in the transition of vapour to liquid is negative, S=-100 .