Question

does activation energy is equal to sum of the energies of the reactants and products?​

Answer 1

Answer:

Rather, the reactant energy and the product energy remain the same and only the activation energy is altered (lowered). A catalyst is able to reduce the activation energy by forming a transition state in a more favorable manner. ... This energy is known as Binding Energy.

Answer 2

Activation energy = Threshold energy - Energy of the reactants