activation energy
（ plural ）
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(chemistry, physics) The energy required to initiate a reaction. For example, the flame from the fuse of a firecracker provides a small initial amount of energy, after which the explosive reaction proceeds by itself, releasing a considerably larger quantity of energy. A small push given to a stable but top-heavy object may cause it to fall over; the potential energy released during the fall was present in the system all along but could not be realized as long as the object was upright and balanced.
activation energy
To model the reaction rate, the team measured the activation energy and then introduced a catalyst to lower the barrier.
To model the reaction rate, the team measured the activation energy and then introduced a catalyst to lower the barrier.
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