He thermite reaction, in which powdered aluminum reacts with iron(III) oxide, is highly exothermic. 2 Al(s) + Fe2O3(s) Al2O3(s) + 2 Fe(s) Use standard enthalpies of formation to find for the thermite reaction

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The thermite reaction, in which powdered aluminum reacts with iron oxide, is highly exothermic: . Use standard enthalpies of formation to find ΔH∘rxn for the thermite reaction. Express the heat of the reaction in kilojoules to four significant figures.

ΔH∘rxn for the thermite reaction is -851.5 kJ

Explanation:

The balanced chemical reaction is :

We have to calculate the enthalpy of reaction .

where,

We are given:

Putting values in above equation, we get:

ΔH∘rxn for the thermite reaction is -851.5 kJ

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