Ethanol boils at $78.4^{\circ}C$, the enthalpy of vaporization of ethanol is $42.4\: kJ/mol$. Calculate entropy of vaporization of ethanol.

Question

$\begin {array} {1 1} (a)\;540.816\: J/K-mol & \quad (b)\;0.1206\: J/K-mol \\ (c)\; 120.66 \: J/K-mol & \quad (d)\;-540.816 \: J/K-mol \end {array}$