Substance X Has a Heat of Vaporization of 47 $\to$ X(g)at 1 Atm and 423°C Calculate the Value Of

Substance X has a heat of vaporization of 47.1 kJ/mol at its normal boiling point (423°C) .For the process X(l) $\to$ X(g) at 1 atm and 423°C calculate the value of $\Delta$ S.

A) 0
B) 67.7 J/K mol
C) 111 J/K mol
D) -67.7 J/K mol
E) -111 J/K mol