In which of the following reactions, standard reaction entropy change (∆S°) is positive and standard Gibbs energy change (∆G°) decreases sharply with increasing temperature? (2012)

C(graphite) + 1 2 O₂(g) → CO(g) ∆ng =1− 1 2 = 1 2 As amount of gaseous substance is increasing in the product side thus, ∆S is positive for this reaction. And we know that ∆G = ∆H – T∆S As ∆S is positive, thus increase in temperature will make the term (–T∆S) more negative and ∆G will decrease.