AP BIOLOGY

Detailed explanation-1: -The formation of ATP by condensation between ADP and inorganic phosphate is a highly endothermic reaction.

Detailed explanation-2: -Reactions that produce energy, like ATP hydrolysis, are referred to as exothermic reactions (or sometimes exergonic, meaning roughly the same thing).

Detailed explanation-3: -ATP hydrolysis is exothermic because the bonds involved with the hydrolysis products are in a lower energy state than the phosphoanhydride bonds involved in the ATP molecules. The energy difference could be lost to the surroundings in the form of heat as the reaction proceeds, which is what happens in solution.