Chapter 18, Problem 18.78SP

For the vaporizatio of benzene, $\Delta {\text{H}}_{\text{vap}}=30.7\text{kJ/mol}$ and $\Delta {\text{S}}_{\text{vap}}=87.0\text{J/K}\text{.mol)}\text{.}$ Calculate $\Delta {\text{S}}_{\text{surr,}}$ and $\Delta {\text{S}}_{\text{total}}$ at:

   ${\text{70}}^{\text{o}}\text{C}$  (b) ${\text{80}}^{\text{o}}\text{C}$  (c) ${\text{90}}^{\text{o}}\text{C}$

Does benzene boil at 70^oC and 1 atm pressure? Calculate the normal boiling point of benzene.