For a bimolecular elementary reaction
A + B   ®   Products
rate of reaction can be expressed as
a /
AB
Rate
Z
e E
RT
−
=
(3 23)
where ZAB represents the collision frequency of reactants, A and B
and e
-Ea /RT represents the fraction of molecules with energies equal to
or greater than Ea Comparing (3 23) with Arrhenius equation, we can
say that A is related to collision frequency