Feb 24, 2018

Chemical potential energy

#### Explanation:

Since $A T P$ is a huge molecule, there are a lot of bonds stored within that molecule. In those bonds, there is chemical potential energy, waiting to be released, especially in the phosphate $\left(P {O}_{4}^{3 -}\right)$ groups in the molecule. In the second and third phosphate groups, they are broken down into $A D P$ and energy. Have a look at this picture of an $A T P$ molecule:

There are so many bonds here, and many, if not all are covalent. These types of bonds are very strong, and therefore have a lot of energy in them.

So, the energy stored within an $A T P$ molecule is in the form of chemical potential energy.

Feb 27, 2018

The energy stored in ATP is potential chemical energy.

#### Explanation:

$\text{ATP}$ is adenosine triphosphate, which means it is a molecule of adenosine (adenine and ribose) chemically bonded to three phosphate groups. The chemical bond between the second and third phosphate groups is a high energy bond. When that bond is broken, energy is released, producing $\text{ADP}$ (adenosine diphosphate). The energy released is used by the cell to do work. During cellular respiration, $\text{ATP}$ is produced by the addition of a third phosphate group to $\text{ADP}$ molecules.