Activation energy

IIT JEE Guidance › Physical Chemistry questions › Activation energy

A catalyst decreases the activation energy of the rxn
Aâ†’B (reversible)
by 2%. Î”H = 37.02 Kcal. At 300 K, 4*10^-8% molecules of B are able to cross over the potential energy barrier in absence of catalyst. How many times the catalyst will increase the rate of forward reaction at 300 K??

#Chemistry #Physical Chemistry

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6 Answers

1

injun joe ·2009-08-13 04:07:38

Any1?

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1

gagar.iitk ·2009-08-16 02:21:02

find activation energy for backward direction by fraction of activated molecules......then find it for forward reaction with the help of Î”H then find the activation energy after catalyst is used ( 2%) then the K after catalyst is used then Rate is directly proportional to k from here u can find ur ans
go step by step plz

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gagar.iitk ·2009-08-16 07:00:01

e^-e_a/rt=fraction of activated molecules =4x10^-10
now try it

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24

eureka123 ·2009-08-16 07:00:56

okkk..trying..

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injun joe ·2009-09-03 06:17:04

Got it!!

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11

mona100 ·2009-09-03 10:46:34

What is the answer??

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Your Answer

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