Question
In: Chemistry
Which of the following is an elementary reaction?
Which of the following is an elementary reaction?
A. 2 ClO ---------- Cl 2 + O 2 Rate = k
[ClO]
B. N 2 + O 2 --------- 2 NO Rate = k [N
2 ] [O 2 ]
C. NO + O 3 --------- NO 2 + O 2
Rate = k [NO] 2
D. 2 O 3 ------------ 3 O 2 Rate = k [O
3 ]
Solutions
Expert Solution
The correct option is (B).
EXPLANATION: Consider the following general elementary reaction:
aA + bB 
cC + dD
The rate of the reaction is written as: rate = k[A]a[B]b
(A) 2ClO
Cl2 + O2
If it is an elementary reaction rate must be: rate = k [ClO]2. So, it is not an elementary reaction.
(B) N2 +
O2
2NO
If it is an elimentary reaction rate must be: rate = k [N2][O2]. As it is the rate give, this is an elementary reaction.
(C) NO + O3
NO2 + O2
If it is an elementary reaction rate must be: rate = k [NO][O3]. So, it is not an elementary reaction.
(D) 2O3
3O2
If it is an elementary reaction rate must be: rate = k [O3]2. So, it is not an elementary reaction.
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