CHAP. 9: CHEMICAL KINETICS [CONTENTS] 320
In practice, the Arrhenius equation is used most often. The more general relation (9.165)
with adjustable values of the constantsa,b,cis used in the case of a broad temperature range
and for complex reactions. The relation derived from the collision theory is used rarely. The
relation following from the absolute-rates theory is applied primarily in theoretical chemical
kinetics.
Note: If none of these relations is able to describe the experimental dependence of the
rate constant on temperature well, then either the reaction is not a chemical reaction or
its mechanism is more complicated or the experimental data are faulty.