wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

For a reaction taking place in three steps, the rate constants are k1,k2 and k3. The overall rate constant k=k1k2k3. If the energy of activation values for the first, second and third stages are 40,50 and 60 kJ mol1 respectively, then the overall energy of activation in kJ mol1 is:

A
30
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
40
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
60
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
50
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 30
k=k1k2k3
AeEa/RT=AeEa1/RT×AeEa2/RTAeEa3/RT
eEa/RT=e(Ea1Ea2+Ea3)/RT
Ea=Ea1+Ea2Ea3
=40+5060=30 kJ mol1

flag
Suggest Corrections
thumbs-up
2
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Arrhenius Equation
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon