Changes

: In an [[endothermic]] [[Chemical Reaction|reaction]] [[energy]] is then [[Absorb (Physics)|absorbed]] as [[atom]]s form new [[Chemical Bond|chemical bonds]].

: In an [[endothermic]] [[Chemical Reaction|reaction]] more [[energy]] is taken in breaking the [[Chemical Bond|bonds]] in the [[reactant]]s than is released in the formation of new [[Chemical Bond|bonds]] in the [[product]]s. So there is a net input of [[energy]].