Whatismeant by entropy drivenreaction? How can the reaction with positivechange of enthalpy and entropydriven?

Whatismeant by entropy drivenreaction? How can the reaction with posit

1.	Whatismeant by entropy drivenreaction? How can the reaction with positivechange of enthalpy and entropydriven?
Answer» Solution :The free energy change of a reaction is GIVEN by `DeltaG = DeltaH -TDELTAS` For a reaction to be SPONTANEOUS, `DeltaG` shouldbe `-ve`. If both `DeltaH`and `DeltaS` are positive, `DeltaG` can be`-ve` if `T Delta Sgt DeltaH`in magnitudee. Thus, entropy factor should dominate over enthalpyfactor. Such reactions are therefore, called entropy driven.This canhappen in either of the following two WAYS `:` (i) `DeltaS` shoul beso learge that even if T is low , `T DeltaS` should be GREATER than`DeltaH` (ii) If` DeltaS`is small, T should be so large that`T DeltaSgt DeltaH`