Answer:
Explanation:
Substances require a certain activation energy since they have to overcome the forces of repulsion, vibration, translation, among others, that exist between the atoms of the molecules that will react. Then the Activation Energy (Ea) is the minimum energy needed to initiate a chemical reaction. In other words, the Activation Energy represents the energy barrier that the molecules have to save in order for the reaction to take place.
In other words, for a chemical reaction to exist, the reagent molecules must collide with each other. If the energy value is less than this necessary minimum, there will simply be no alteration or change between the molecules after the collision occurs.
