Which statement gives the definition of the activation energy, $E_a$, for a reaction?
- AIt is the minimum energy that colliding particles must have to react.
- BIt is the minimum energy that endothermic reactions take in from their surroundings.
- CIt is the maximum energy that exothermic reactions transfer to their surroundings.
- DIt is the maximum energy released when the bonds in the products of a reaction form.