7. When determining the energy of a reaction where 0.250 mol of a substance with a AH = -2250.0 kJ/mol reacts, we perform this calculation: comb -2250.0 KJ x kJ -2250.0 KJ OR 0.250 mol 1mol 0.250 mol 1mol Why can't we simply say that the energy of the reaction is -2250.0 KJ? (1 marks)