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Which of the following describes an increase in entropy of the system? \mathrm{PbBr}_{2}(s) \longrightarrow \mathrm{Pb}^{2+}(a q)+2 \mathrm{Br}^{-}(a q) \mathrm{N}_{2}(g)+3 \mathrm{H}_{2}(g) \longrightarrow 2 \mathrm{NH}_{3}(g) \mathrm{CO}_{2}(g) \longrightarrow \mathrm{CO}_{2}(s) \mathrm{COH}_{2} \text { at

} 25^{\circ} \mathrm{C} \text { cooled to } \mathrm{COH}_{2} \text { at } 10^{\circ} \mathrm{C} 3 \mathrm{CO}_{2}(g)+4 \mathrm{H}_{2} \mathrm{O}(g) \longrightarrow \mathrm{C}_{3} \mathrm{H}_{8}(g)+5 \mathrm{O}_{2}(g)

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