In which of the following reactions, standard reaction entropy change ($\Delta $So) is positive and standard Gibb's energy change ($\Delta $Go) decreases sharply with increasing temperature ?

Question

In which of the following reactions, standard reaction entropy change ($\Delta $S^o) is positive and standard Gibb's energy change ($\Delta $G^o) decreases sharply with increasing temperature ?

C_(graphite) + ${1 \over 2}$O_2(g) $ \to $ CO_(g)

CO_(g) + ${1 \over 2}$O_2(g) $ \to $ CO_2(g)

Mg_(s) + ${1 \over 2}$O_2(g) $ \to $ MgO_(g)

${1 \over 2}$C_(graphite) + ${1 \over 2}$O_2(g) $ \to $ ${1 \over 2}$CO_2(g)

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