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29-02-2024
Chemistry

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Using enthalpies of formation, calculate the standard change in enthalpy for the thermite reaction:

2Al(s) + Fe2O3(s) ⟶ Al2O3(s) + 2Fe(s)

This reaction occurs when a mixture of powdered aluminum and iron(III) oxide is

ignited with a magnesium fuse. The following enthalpies of formation are known:

ΔHºf for Fe2O3(s) = -826 kJ

ΔHºf for Al2O3(s) = -1676 kJ

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