# Gibbs Free Energy and ATP

Gibbs free energy describes the maximum of useful work that can be done by a chemical reaction. My question is(Sorry I am not into chemistry and biochemistry) : during a chemical reaction that creates ATP, we say that ATP stores energy between its chemical bonds . For exemple this is the equation of creating ATP: ADP + Pi + energy ----> ATP and of course this reaction has DG. What is the relation of DG with the stored energy? Is it the same?

No, it can't be the same. If it were exactly the same, then it would mean that ATP was storing every last iota of available free energy. Another way of saying that is that ATP synthesis would be 100% energy efficient. That is, the free energy change $\Delta G$ in the reaction $\ce{ADP + Pi + energy -> ATP}$ would be zero.