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The enthalpy change for the reaction 2al(s)+fe2o3(s)→2fe(s)+al2o3(s) is −860kj/mol. Based on the standard enthalpies of formation δh∘f provided in the table, what is the approximate δh∘f for fe2o3(s) ?.

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The heat of reaction is -1410.9 kJ/mol.

What is heat of formation?

The heat of formation is the heat absorbed or evolved when a substance is formed from its component elements. The enthalpy of formation of a pure substance is zero.

ΔHrxn = ΣΔHfproducts - ΣΔHfreactants

ΔHrxn =Σ[0 kJ/mol + (-1675.7 kJ/mol)] - Σ0 kJ/mol + (-264.8 kJ/mol)

ΔHrxn = -1675.7 kJ/mol + 264.8 kJ/mol

ΔHrxn = -1410.9 kJ/mol

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