Calculate the entropy change when 1 mole of ethanol is evaporated at 351 K. The molar heat of vapourisation of ethanol is 39.84 "kJ mol"^(-1)

Calculate the entropy change when 1 mole of ethanol is evaporated at 3

1.	Calculate the entropy change when 1 mole of ethanol is evaporated at 351 K. The molar heat of vapourisation of ethanol is 39.84 "kJ mol"^(-1)
Answer» Solution :Given : `T_b`=351 K `DeltaH_"VAP"=39840 "J mol"^(-1)` `DeltaS_V`=? `DeltaS_V=(DeltaH_"vap")/T_b` `DeltaS_V=39840/351` `DeltaS_V=113.5 J K^(-1) "mol"^(-1)`