Question

5 3 PE 6 2 B 1 D Progress of Reaction

Please answer ALL regarding this PE diagram

In the PE diagram, how many mechanism steps are there in the forward reaction? ______

In the PE diagram, what is the RDS (rate determining step) for the forward reaction? Enter letters or numbers in the following format: X-Y, 7-8, or X-7. ______

In the PE diagram, which species is present in the lowest concentration? Enter a letter or a number. ______

In the PE diagram, which step has the largest rate constant in the forward reaction? Enter letters or numbers in the following format: X-Y, 7-8, or X-7. ______

Answer 1

Potential energy diagram for any reaction is an imprtant tool to find the kinetic nature of reaction . The number of active states indicate the machanism. The activation energies would also provide information about how fast a reaction can proceed.

of reaction z It's obvious seeing the numbers of activated states the total no. of steps in forward reaction -3. a since B-C step involves highest amount of activation energy it is the slowest step in forward reaction & hence is rate determining step, SO, RDS = B-C 3-4 It's obvions that the species e has highest potential energy among all of them & activation energy from C-D step is quite low comparsive with others, the concentration of e is low. Lowest cone = e. ka de ART (Arhenius canation) karate constant, da pre exponential factor (freamency factor, activation energy, Ravoniv gas const, T- absolute temperature. So, higher the Ea lower the rate constk. 3-4, Bte Step has the highest & C-D, 5-6 has the lowest Fa. largest rate constant : C-D, 5-6 for forward reaction. - -ta