Question

Use the given ΔH°f data to calculate the ΔH°rxn for the "thermite reaction" below:

{Al2O3(s), ΔH°f = –1669.8 kJ/mol; Fe(l), ΔH°f = 12.40 kJ/mol; Fe2O3(s), ΔH°f = –822.2 kJ/mol}

2Al(s) + Fe2O3(s) → Al2O3(s) + 2Fe(l) ΔH°rxn = ??

Answer 1

do you know Hess's law? \(H^o_{(rxn)}=\Sigma H^o_{f~(products)}-\Sigma H^o_{f~(reactants)}\)