Energy is absorbed to break bonds. Bond-breaking is surely an endothermic method. Electrical power is launched when new bonds kind. No matter if a reaction is endothermic or exothermic is determined by the difference between the energy needed to crack bonds and also the Strength released when new bonds variety. https://bookmarkpressure.com/story13233069/getting-my-what-is-a-chemical-reaction-to-work