Question

[Review Topics] [References] Free Energy (kcal/mol) Reaction progress Use the reaction energy diagram above to answer the following questions. Calculate the activation energy, AG*, for the step C to B. kcal/mol Calculate the overall energy change, AGº, for the process B to A. kcal/mol Which step is faster, (a) B to A or (b) B to C?

Answer 1

Delta G of srep C to B can be easily calculated easily from subtracting energy of transistion state ( peak between b & c) from energy of C ====> 16 kcal/mol - 1 kcal/mol = 15 kcal/mole Ans

Now overall energy change from B to A is given energy of B - energy of A ( 11 - 5) = 9kcal/mole

Faster step is decided by activation energy so path which have less activation energy will have faster rate so faster step will be from B to C

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