$CO(g) + \frac{1}{2} O _2 \longrightarrow CO_2$, $\Delta H$ and $\Delta S$ for the reaction are $-283\; KJ$ and $-87\; JK^{-1}$. It was intended to carry out this reaction at $1000, 1500, 3000$ and $3500\; K$. At which of these temperatures would this reaction be thermodynamically spontaneous?
