You are investigating the formation of nitrogen monoxide in the atmosphere. Nitrogen dioxide decomposes into nitrogen monoxide and oxygen according to the reaction:NO2(g) = NO(g) + O2(g)The decomposition of NO2 happen in the presence of light (photochemical) or at high temperature (thermal). The thermal decomposition of NO2 has a different mechanism than the photochemical decomposition. a) Use the following data to identify the rate law for the thermal decomposition ofNO.Exp.[NO2] (M)Rate (M/s)1.56x1040.350.451.78x104b) Use the following data to identify the rate law for the photochemicaldecomposition of NO2.[NO2] (M)Rate (M/s)2.45x103Exp.0.350.453.15x1031212 c) Two mechanisms, shown below, have been proposed for the differentdecomposition reactions.Mechanism A:SlowStep 1: NO2(g) → NO(g) + 0(g)Step 2: NO2(g) + 0(g) → NO(g) + 02(g)FastMechanism B:Step 1: NO2(g) + NO2(g) = N204(g)Step 2: N204(g) → NO(g) + NO3(g)Step 3: NO3 (g) → NO(g) + 02(g)FastSlowFastIdentify the correct mechanism for the thermal and photochemicaldecomposition of NO2. Justify your answer using the mechanistic steps andoverall rate law.

There are two pathways for the decomposition of gaseous NO2. The order of the reaction can be…

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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You are investigating the formation of nitrogen monoxide in the atmosphere. Nitrogen dioxide decomposes into nitrogen monoxide and oxygen according to the reaction:

NO₂(g) = NO(g) + O₂(g)

The decomposition of NO₂ happen in the presence of light (photochemical) or at high temperature (thermal). The thermal decomposition of NO₂ has a different mechanism than the photochemical decomposition.

a) Use the following data to identify the rate law for the thermal decomposition of
NO.
Exp.
[NO2] (M)
Rate (M/s)
1.56x104
0.35
0.45
1.78x104
b) Use the following data to identify the rate law for the photochemical
decomposition of NO2.
[NO2] (M)
Rate (M/s)
2.45x103
Exp.
0.35
0.45
3.15x103
12
12

c) Two mechanisms, shown below, have been proposed for the different
decomposition reactions.
Mechanism A:
Slow
Step 1: NO2(g) → NO(g) + 0(g)
Step 2: NO2(g) + 0(g) → NO(g) + 02(g)
Fast
Mechanism B:
Step 1: NO2(g) + NO2(g) = N204(g)
Step 2: N204(g) → NO(g) + NO3(g)
Step 3: NO3 (g) → NO(g) + 02(g)
Fast
Slow
Fast
Identify the correct mechanism for the thermal and photochemical
decomposition of NO2. Justify your answer using the mechanistic steps and
overall rate law.

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