Fe$_2$O$_{3(s)}$ + 2Al$_{(s)}$ â†’ Al$_2$O$_3$ + 2Fe$_{(s)}$. If the heats of formation of Al$_2$O$_3$ and Fe$_2$O$_3$ are - 1670 kJmol$^{-1}$ and - 822 kJmol$^{-1}$ respectively, the enthalpy change in kJfor the reaction is ?

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Fe $_{2}$ O $_{3 (s)}$ + 2Al $_{(s)}$ â†’ Al $_{2}$ O $_{3}$ + ...

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Fe2O3(s) + 2Al(s) â†’ Al2O3 + ...

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Fe $_{2}$ O $_{3 (s)}$ + 2Al $_{(s)}$ â†’ Al $_{2}$ O $_{3}$ + ...