# ATP break down and energy release?

I have a very basic question. Energy is absorbed to break bonds. Bond-breaking is an endothermic process. Energy is released when new bonds form. Bond-making is an exothermic process.

But ATP breaks down to ADP and releases energy right? Is there anything wrong in my understanding?

• I was confused about this for a long time as a student, and so were many of my classmates. Goes to show how slightly imprecise language can be problematic. Once I realized the $\rm{P-O-P}$ bonds weren't broken (bond homolysis or heterolysis) so much as hydrolyzed, it all made sense. Hydrolysis reactions can release quite a bit of energy. – Nicolau Saker Neto Sep 18 '14 at 0:02