The enthalpy of formation of Fe₂O₃(s) is -824.2 kJ/mol. Calculate the enthalpy change for the reaction: 4Fe(s) + 3O₂(g) → 2Fe₂O₃(s).
a) -206.05 kJ
b) -412.1 kJ
c) -824.2 kJ
d) 824.2 kJ