Chemical Kinetics and Nuclear ChemistryHard
Question
A reaction takes place in three steps having rate constants K1, K2, K3 respectively. The overall rate constant K = 
. If energies of activations for the three steps are 40, 30, 20 kJ respectively, the overal energy of activation is :
. If energies of activations for the three steps are 40, 30, 20 kJ respectively, the overal energy of activation is :Options
A.10
B.15
C.30
D.60
Solution
given K = 
we know that for any reaction
so differentiating the given relation of k with k1, k2 & k3 with respect to temperature, we have
= 
Ea = Ea3 + Ea1 - Ea2
= (20 + 40 - 30) = 30 kJ/mol
we know that for any reaction
so differentiating the given relation of k with k1, k2 & k3 with respect to temperature, we have
= Ea = Ea3 + Ea1 - Ea2
= (20 + 40 - 30) = 30 kJ/mol
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