CHAP. 9: CHEMICAL KINETICS [CONTENTS] 279
Obr.9.3: Time dependence of the reactants concentration for a second-order reaction of the type
A + B→R + S. The initial concentrations of the reactants arecA0andcB0, the initial concentrations
of the products are zero.
9.2.4 Third-order reactions.
We will deal with four types of third-order reactions:
a) Type
3 A→products. (9.47)
when there is only one reactant.
b) Type
2 A + B→products, (9.48)
when there are two reactants and their stoichiometric coefficients are equal to the partial orders
of the reaction.
c) Type
A + B + C→products, (9.49)
when there are three reactants and their stoichiometric coefficients are equal to the partial
orders of the reaction, i.e. one.