Calculate the Standard Molar Entropy of Vaporization of Phosphorus Trichloride

Calculate the standard molar entropy of vaporization of phosphorus trichloride, PCl₃, at its boiling temperature, 74 °C, given that the standard molar enthalpy of vaporization of phosphorus trichloride is 30.5 kJ mol^-1.

A) +2.43 J K^-1 mol^-1
B) +109 J K^-1 mol^-1
C) +412 J K^-1 mol^-1
D) +78.9 J K^-1 mol^-1