Question

For an exothermic reaction
(1) E > AH (2) E <AH
(3) E =AH
(4) any one of the above​

Answer 1

(3) E=AH

Because this reaction must abide by the law of conservation of matter. If it is not balanced, it implies that atoms are created and destroyed, which clearly opposes the law of conservation of matter. Hence, E=AH