Question

What is meant by entropy driven reaction ? how can the reaction with positive change of enthalpy and entropy be made entropy driven ?

Answer 1

A "thermodynamically favored"reaction (ΔG < 0) is sometimes referred to as "spontaneous". ...Reactions can be 'driven by enthalpy' (where a very exothermic reaction(negative ΔH) overcomes a decrease in entropy) or 'driven by entropy' where an endothermic reaction occurs because of a highly positive ΔS.

Answer 2

A "thermodynamically favored"reaction (ΔG < 0) is sometimes referred to as "spontaneous". ...Reactions can be 'driven by enthalpy' (where a very exothermic reaction(negative ΔH) overcomes a decrease in entropy) or 'driven by entropy' where an endothermic reaction occurs because of a highly positive ΔS.