From the given figure: i) Calculate DeltaE for the reactionand energy of activation for the forward reaction and energy of activation for the backward reaction. ii) The dotted curve is in the presence of a catalyst, what is the energy of activation for the two reactions in the presence of the catalyst? iii) will the catalyst change the extent of the reaction?

From the given figure: i) Calculate DeltaE for the reactionand energy

1.	From the given figure: i) Calculate DeltaE for the reactionand energy of activation for the forward reaction and energy of activation for the backward reaction. ii) The dotted curve is in the presence of a catalyst, what is the energy of activation for the two reactions in the presence of the catalyst? iii) will the catalyst change the extent of the reaction?
Answer» <P> Solution :i)For the uncatalysed reaction, represented by upper curve Energy of the reaction `(E_(r))= 110 kJmol^(-1)` Energy of the products `(E_(p)) = 100 kJmol^(-1)` `therefore` Change in the internal energy `(DeltaE) = E_(p) -E_(R )` `=140-110=30kJmol^(-1)` Energy of activation for the reverse reaction `(E_(a)(f) = E^(0)-E_(p)` `140-100 = 40 kJ MOL^(-1)` ii) For the catalyst reaction, represented by lower curve, `E_(a)(f) = E^(0) - E_(r) = 120-110 = 10 kJmol^(-1)` `E_(a)(b) = E^(0)-E_(p) = 120-100 = 20 kJmol^(-1)` iii) There will no effect on the EXTENT for the reaction because the activation energies for the FORWARD reactions have decreased EQUALLY.