Energy Profile

Given the following graph. (a) Calculate Delta H for the reaction and energy of activation for the forward and backward reaction. (b) Curve (2) is the energy profile in the presence of a catalyst. What is the energy of activation for the two reaction in the presence of a catalyst? ( c) Will the catalyst change the extent of the reaction?

Substances which alter the velocity of a reaction by mere presence, without undergoing any change in mass and compossition are termed catalyst and the phenomenon is known as catalysis For the reaction (ArarrB+C) , the energy profile diagram is given in the figure below. The decrease in ht eenergy of activation in hte presence of catalyst is