Question

An initial step in the production of iron in a blast furnace involves the conversion of iron (iii) oxide and carbon monoxide into iron (ii,iii) oxide and carbon dioxide.Calculate the enthalpy of this reaction using standard molar enthalpies of formation.

Answer 1

3Fe₂O₃(s) + CO(g) → 2Fe₃O₄(s) + CO₂(g)
∆H = ∑nH°f(products) - ∑nH°f(reactants)
∆H = 2(-118.4 kj/mol) - 393.5 kj/mol - (3(-824.2 kjmol)- 110.5 kj/mol) = 47.2 kJ