NCERT Class XII Chemistry
Chapter - Chemical Kinetics
Questions with Solutions
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Question : 30
Total: 39
The rate of a reaction quadruples when the temperature changes from 293 K to 313 K. Calculate the energy of activation of the reaction assuming that it does not change with temperature.
Solution:
Given r 2 = 4 r 1 ,
T 1 = 293 , T 2 = 313 K , E a = ?
We know,
=
=
Using Arrhenius equation,
log
=
(
−
)
log 4 =
( 1 293 −
)
or,E a = log 4 ×
or,E a = 52.864 k J
We know,
Using Arrhenius equation,
or,
or,
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