Rubidium Has a Heat of Vaporization of 69 $\circ$ C) Calculate $\Delta$

Rubidium has a heat of vaporization of 69.0 kJ/mol at its boiling point (686 ^$\circ$ C) . Calculate $\Delta$ S for this process, Rb(l) $\rarr$ Rb(g) , at 1 atm and 686 ^$\circ$ C.

A) 65.9 J/K·mol
B) 67.9 J/K·mol
C) 69.9 J/K·mol
D) 71.9 J/K·mol
E) None of the above