The rate of a reaction quadruples when the temperature changes from 300   to 310   K . The…

The rate of a reaction quadruples when the temperature changes from 300 to 310K . The activation energy of this reaction is:

(Assume Activation energy and pre-exponential factor are independent of temperature; ln(2)=0.693; R=8.314 J mol-1K-1)
  1. 53.6 kJmol-1
  2. 214.4 kJmol-1
  3. 107.2 kJmol-1
  4. 53.7 kJmol-1

Solution

The activation energy, rate constant and temperature can be related using Arrhenius equation.

k=Ae-EaRT

lnk2k1=EaR 1T1-1T2 

ln4=EaR 1300-1310 

2×0.693=EaR 10300×310 

E a  =  2×0.693×300×310×8.314 10  = 107.2 kJ/mol

Asked in: JEE Main 2017 (09 Apr Online)

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