A) \[704\,J{{K}^{-1}}\,mo{{l}^{-1}}\]
B) \[80\,J{{K}^{-1}}\,mo{{l}^{-1}}\]
C) \[24.64\,J{{K}^{-1}}mo{{l}^{-1}}\]
D) \[7.04\,J{{K}^{-1}}\,mo{{l}^{-1}}\]
Correct Answer: B
Solution :
Entropy of vaporisation \[(\Delta S)\] \[\text{=}\frac{\text{enthalopyof}\,\text{vaporisation}\,\text{( }\!\!\Delta\!\!\text{ }\!\!\Eta\!\!\text{ )}}{\text{boiling}\,\text{point}\,\text{(in}\,\text{K)}}\] Given, AH = 24.64 kJ mol1 and\[\Delta H=24.64\,\text{KJ}\,\text{mo}{{\text{l}}^{-1}}\]and boiling point = 35 + 273 = 308 K \[\therefore \] \[\Delta S=\frac{24.64\times {{10}^{3}}\,J\,mo{{l}^{-1}}}{308\,K}\] \[=80\,\text{J}{{\text{K}}^{-1}}\,\text{mo}{{\text{l}}^{-1}}\]
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