12.6 Reaction Mechanisms

In general, can we predict the effect of doubling the concentration of A on the rate of the overall reaction $A + B \rightarrow C$? Can we predict the effect if the reaction is known to be an elementary reaction?

What is the rate law for the elementary termolecular reaction $A + 2 B \rightarrow \text{products}?$ For $3 A \rightarrow \text{products}?$

Write the rate law for each of the following elementary reactions:

(a) $\text{O}_{3} \overset{ \text{sunlight} }{\rightarrow} \text{O}_{2} + \text{O}$

(b) $\text{O}_{3} + \text{Cl} \rightarrow \text{O}_{2} + \text{ClO}$

(c) $\text{ClO} + \text{O} \rightarrow \text{Cl} + \text{O}_{2}$

(d) $\text{O}_{3} + \text{NO} \rightarrow \text{NO}_{2} + \text{O}_{2}$

(e) $\text{NO}_{2} + \text{O} \rightarrow \text{NO} + \text{O}_{2}$

Experiments were conducted to study the rate of the reaction represented by this equation.This question is taken from the Chemistry Advanced Placement Examination and is used with the permission of the Educational Testing Service.
$\text{2NO} \left(g\right) + 2 \text{H}_{2} \left(g\right) \rightarrow \text{N}_{2} \left(g\right) + 2 \text{H}_{2} \text{O} \left(g\right)$

Initial concentrations and rates of reaction are given here.

Consider the following questions:

(a) Determine the order for each of the reactants, NO and H₂, from the…