Question
The reaction 2NO(g) + O2(g) 2NO2(g) is second order in NO and first order in O2....
The reaction 2NO(g) + O2(g) 2NO2(g) is second order in NO and first order in O2. When [NO] = 0.2 M and [O2] = 3.4 M, the observed rate of disappearance of NO is 0.00001265 M/s.
A) What is the value of the rate constant?
B) What are the units of the rate constant?
- M0 s-1
- M-3 s-1
- s-1
- M3 s
- M-1
- M1 s1
- M-1 s-1
- M-1 s-2
- M-2 s-1
- the rate constant has no unit
C) What would happen to the rate if the concentration of NO were increased by a factor of 3.1?
- Rate of reaction would increase
OR
- Rate of reaction would decrease
D) By what factor would the rate of reaction of NO increase?
E) What is the rate of reaction when [NO] = 0.1 M and [O2] = 0.26 M?
Homework Answers
Answer #1
A) What is the value of the rate constant?
B) What are the units of the rate constant?
- M0 s-1
- M-3 s-1
- s-1
- M3 s
- M-1
- M1 s1
- M-1 s-1 (<------- ANSWER)
- M-1 s-2
- M-2 s-1
- The rate constant has no unit
C) What would happen to the rate if the concentration of NO were increased by a factor of 3.1?
- Rate of reaction would increase.
OR
- Rate of reaction would decrease.
R/ By a 3.1 factor rate of [NO] decrease
D) By what factor would the rate of reaction of NO increase?
If: m "is a factor" 
Then: The value of the constant is increased if the concentration [NO] is multiplied by a "m" factor, in the range 0 < m < 1
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