Chemical Kinetics - Result Question 27

####27. For a first order reaction, AP, the temperature ( T ) dependent rate constant (k) was found to follow the equation :

logk=2000T+6.0

the pre-exponential factor A and the activation energy Ea, respectively, are

(2009)

(a) 1.0×106s1 and 9.2kJmol1

(b) 6.0s1 and 16.6kJmol1

(c) 1.0×106s1 and 16.6kJmol1

(d) 1.0×106s1 and 38.3kJmol1

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Answer:

Correct Answer: 27. (d)

Solution:

  1. The logarithmic form of Arrhenius equation is logk=logAEa2.303RT

Given : logk=62000T

Comparing the above two equations :

logA=6A=106  and Ea2.303R=2000 Ea=2000×2.303×8.314J =38.3kJmol1



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