Question

[Review Topics] References 25 20 15 10 В A 0 Reaction progress Use the reaction energy diagram above to answer the following questions. Calculate the activation energy, AG, for the step B to C kcal/mol Calculate the overall energy change, AG°, for the process A to B. kcal/mol Which step is faster, (a) C to B or (b) B to A? Submit Answer Retry Entire Group more group attempts remaining Free Energy (kcal/mol) LO

Answer 1

A

B

Activation energy: An "energy barrier must be overcome to get the product side. The height of this energy barrier is called activation To for B . the st to c :- - Activaction energy for at point B. energy at all Kcal/mol. energy at paint B 2 24k cal/mol activation energy is 24-11 a 13 kcal/mol

c

Overall energy change : (04) energy DG B/w for a reaction reactant and is the product R= Reactant la Product neram ToG reaction - for the process A to B.: - energy at A = 7 kcal/molto at B = 11 kcal/mol OG Hence Do = 11-7 = 4 kcal/mol for process A to B.

faster is and Process B to c from o is A to B slower Because activation energy for the pecacess A to B is lowder Do whereae it is higher for the process B to e i.e. the step having higher activation energy is slower, whereas the steb having lower activation energy is Sasted because banner of o ene Dwill overcome faster. D X - T.S. - shower gasa Transition states. Energy overcome faster (keall at T...-2. sa AL mo - Intermediate Reaction coordinates