Question

The diagram below shows, for a given temperature T, a Boltzmann distribution of the kinetic energy of the molecules of a mixture of two gases that will react together, such as nitrogen and hydrogen. The activation energy for the reaction E-A, IS marked.

Answer 1

Activation energy is the least amount of energy required to activate atoms or molecules to a state in which they can    undergo a chemical reaction. It is the amount of energy required for a chemical reaction to take place. If there is no activation energy, no reaction will occur. And if the energy of the colliding molecules is less than the activation energy, no reaction will also occur. even if a chemical reaction is thermodynamically feasible the reactants need a minimum energy to cross and get to the products. This is as because for every reaction there is a transition state and the minimum amount of energy that is required to go from the reactants to the products.