Page 77 - Basic physical chemistry for the atmospheric sciences

Chemical kinetics

show that

where (p A)o and (p A)1 are the partial pressures of A at the
start of the reaction and at time t, respectivel y , and k is the
rate coefficient for the reaction.
fo
3 . 1 2 . The following mechanism has been proposed r the conver­
sion of Oig) into Oz(g)
03(g) µ 02(g) + O(g) (i)
03(g) + O(g)- 20z(g) (ii)

(a) What is the overall chemical reaction?
(b) What is the intermediate?
(c) What is the rate law for each step?
(d) If the experimentally determined rate law for the overall
reaction is

what is the rate-controlling step?
(e) On what would you surmise that [O(g)] depends?
3 . 1 3 . The experimentally determined rate law for the reaction

is

Show that the reaction mechanism

NO(g) + 02(g) � OONO(g) (fast equilibrium)
NO(g) + OONO(g)- 2N02(g) (slow)

is consistent with the rate law. Show that the alternative
steps
NO(g) + NO(g)� N202 (g) (fast equilibrium)
N 202(g) + 02(g) � 2N 0 2(g) (slow)
w
are also consistent with the rate la . [Additional measure­
ments show that the concentration of OONO(g) is more