Give information about chemical reaction.

Explanation

`to` A chemical reaction is basically a rearrangement of atoms among different molecules.
`to` If the total binding energy of the reacting molecules is less than the total binding energy of the product molecules, the difference appears as heat and the reaction is exothermic.
`to` The opposite is true for energy absorbing (endothermic) reactions.
`to` However, since the atoms are merely rearranged but not destroyed.