SOLVED:What happens to \Delta G (becomes more negative or more positive) for the following chemical reactions when the partial pressure of oxygen is increased? (a) \mathrm{S}(s)+\mathrm{O}_{2}(g) \longrightarrow \mathrm{SO}_{2}(g) (b) 2 \mathrm{SO}_{2}(g)+\mathrm{O}_{2}(g) \longrightarrow 2 \mathrm{SO}_{3}(g) (c) \mathrm{HgO}(s) \longrightarrow \mathrm{Hg}(l)+\mathrm{O}