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Which statement defines activation energy?
It is the sum of the maximum energy and reactant energy.
It is the sum of the product energy and reactant energy.
It is the difference between reactant energy and maximum energy.
It is the difference between product energy and reactant energy.

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MissPhiladelphia
I believe that the best answer among the choices provided by the question is It is the difference between reactant energy and maximum energy. 

Hope my answer would be a great help for you.    If you have more questions feel free to ask here at Brainly.

Answer:

Explanation:

Activation energy is the minimum amount of energy required to begin a reaction.

Reactants have their own certain amount of energy which is known as internal energy and represented by [tex]E_{R}[/tex]. A reaction involves an energy barrier that needs to be crossed by the reactants in order to form the products. This energy barrier is the activation energy.

A reaction that does not have activation energy will not take place at all.  

Therefore, the statement which defines activation energy is that it is the difference between reactant energy and maximum energy.  

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