Is it true that under certain conditions, Mg can reduce $\mathrm{Al}_{2} \mathrm{O}_{3}$ and $\mathrm{Al}$ can reduce $\mathrm{MgO}$ ? What are those conditions?

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Is it true that under certain conditions, Mg can reduce $\mathrm{Al}_{2} \mathrm{O}_{3}$ and $\mathrm{Al}$ can reduce $\mathrm{MgO}$ ? What are those conditions?

Solution
Yes, below $1350^{\circ} \mathrm{C}, \mathrm{Mg}$ can reduce $\mathrm{Al}_{2} \mathrm{O}_{3}$ and above $1350^{\circ} \mathrm{C}, \mathrm{Al}$ can reduce $\mathrm{MgO}$ . This can be inferred from $\Delta \mathrm{G}^{\circ}$ vs T plots.

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