All the molecules in the reacting
species do not have the same kinetic
energy Since it is difficult to predict the
behaviour of any one molecule with
precision, Ludwig Boltzmann and James
Clark Maxwell used statistics to predict
the behaviour of large number of
molecules According  to them, the
distribution of kinetic energy may be
described by plotting the fraction of
molecules (NE/NT) with a given kinetic
energy (E) vs kinetic energy (Fig 3