19. Based on the information below, what is the rate law for the reaction? Overa

Question

19. Based on the information below, what is the rate law for the reaction? Overall reaction: A2+ 2B 2AB Mechanism A2 2A A + B AB A + B AB (slow, rate determining step) (fast step) (fast step) (A) rate kIA2] (C) rate=k(A2)"[B] 20. Which statement is true (B) rate=k(A][B] (D) rate-k[A2][B]2 regarding the energy profile provided? Reaction Coordinate (A) This reaction goes through two stable intermediates. (B) Step-2 is the rate-determining slow step. (C) Step-1 is the rate-determining slow step. (D) The overall reaction is exothermic.

Explanation / Answer

19)
rate is determined by slow step
rate = k*(concentration of reactant with its cofficient raise to its power)
rate = k*[A2]

Answer : option A
20)
given diagram has two peak
so, two transition state is there
and in between two transition state there is one intermediate
so, A is not correct

peak which has more energy will be the rate determing step
here, rate determing step is first step
so, B is not correct
and option C is correct

product has more energy than reactant
so, overall reaction is endothermic

Answer : option C

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