|Activation Energy and the Activated Complex|
|This is the energy that must be reached by 2 colliding molecules before a reaction can take place.|
|If enough energy is supplied to the boulder to push it over the hill
(activation energy barrier), it will spontaneously roll down the mountain,
releasing energy as it moves to a lower state of potential energy. The rate
of boulders being pushed over the cliff will depend on the height of the
activation energy barrier.