Question

. Given are the following thermochemical equations: 2Cu(s) + S(s) → Cu2S(s) H =-79.5 kJ S(s) + O2(g) → SO2(g) H = -297 kJ Cu2S(s) + 2O2(g) → 2CuO(s) + SO2(g) H = - 527.5 kJ Calculate the standard enthalpy of formation of CuO(s) in kJ/mol