When determining the energy of a reaction where 0.250 mol of a substance with a Hcomb = -2250.0 kJ/mol reacts, we perform this calculation:

-2250.0 kJ/1 mol = x kJ/0.250 mol OR 0.250 mol (-2250.0 kJ/ 1 mol)

Why can’t we simply say that the energy of the reaction is -2250.0 kJ?