Which statement correctly describes a chemical reaction?
O Reactants come out of a reaction.
O Energy is always released.
O Bonds between atoms break and new bonds form.
O Products go into a reaction.

The best answer is 3

Bonds are made of energy. There are certain energy changes that occur during the making or breaking of bonds and this is called enthalpy changes. When a bod is broke, energy is required to break the bond, hence energy is taken in or absorbed when bonds are broken. This makes bond breaking an endothermic process.