36 × 10–3
  s–1
Rationalised 2023-24
83
Chemical Kinetics
assumed to be hard spheres and reaction is postulated to occur when
molecules collide with each other The number of collisions per
second per unit volume of the reaction mixture is known as
collision frequency (Z) Another factor which affects the rate of
chemical reactions is activation energy (as we have already studied) For a bimolecular elementary reaction
A + B   ®   Products
rate of reaction can be expressed as
a /
AB
Rate
Z
e E
RT
−
=
(3