Nitrogen oxides can be removed from the exhaust gases of a car engine by using a catalytic converter. Many catalytic converters contain metals such as platinum and rhodium. These act as heterogeneous catalysts. a i What is meant by the term heterogeneous catalysis? ii Explain in general terms how heterogeneous catalysts work. b Nitrogen(IV) oxide and carbon monoxide from car exhausts can react in a catalytic converter. NO,(g) + CO(g) > N0(g) + CO,(g) The rate equation for this reaction is rate = k[NO,P Suggest a two-step reaction mechanism for this reaction that is consistent with this rate equation. c Nitrogen(IV) oxide is formed when nitrogen(II) oxide reacts with oxygen. 2NO(g) + 0,(g) → 2NO,(g) The table shows the data obtained from a series of experiments to investigate the kinetics of this reaction. Experiment (NO]/moldm-³ (0,1/mol dm-³ Initial rate / mol dm³s-! 1 0.00100 0.003 00 21.3 0.00100 0.004 00 28.4 3 0.003 00 0.004 00 256 i Deduce the order of reaction with respect to each reactant. In each case, show your reasoning.
Nitrogen oxides can be removed from the exhaust gases of a car engine by using a catalytic converter. Many catalytic converters contain metals such as platinum and rhodium. These act as heterogeneous catalysts. a i What is meant by the term heterogeneous catalysis? ii Explain in general terms how heterogeneous catalysts work. b Nitrogen(IV) oxide and carbon monoxide from car exhausts can react in a catalytic converter. NO,(g) + CO(g) > N0(g) + CO,(g) The rate equation for this reaction is rate = k[NO,P Suggest a two-step reaction mechanism for this reaction that is consistent with this rate equation. c Nitrogen(IV) oxide is formed when nitrogen(II) oxide reacts with oxygen. 2NO(g) + 0,(g) → 2NO,(g) The table shows the data obtained from a series of experiments to investigate the kinetics of this reaction. Experiment (NO]/moldm-³ (0,1/mol dm-³ Initial rate / mol dm³s-! 1 0.00100 0.003 00 21.3 0.00100 0.004 00 28.4 3 0.003 00 0.004 00 256 i Deduce the order of reaction with respect to each reactant. In each case, show your reasoning.
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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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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Answer following sub-parts only.
b and c(i)
![Nitrogen oxides can be removed from the exhaust gases of a car engine by using a catalytic converter.
Many catalytic converters contain metals such as platinum and rhodium. These act as heterogeneous catalysts.
a i What is meant by the term heterogeneous catalysis?
ii Explain in general terms how heterogeneous catalysts work.
b Nitrogen(IV) oxide and carbon monoxide from car exhausts can react in a catalytic converter.
NO,(g) + CO(g) > NO(g) + CO,(g)
The rate equation for this reaction is
rate = k[NO,]?
Suggest a two-step reaction mechanism for this reaction that is consistent with this rate equation.
c Nitrogen(IV) oxide is formed when nitrogen(II) oxide reacts with oxygen.
2NO(g) + 0,(g) > 2NO,(g)
The table shows the data obtained from a series of experiments to investigate the kinetics of this reaction.
Experiment
[NO]/moldm-3
[0,]/mol dm-3
Initial rate / mol dm³s-1
1
0.00100
0.003 00
21.3
2
0.001 00
0.004 00
28.4
3
0.003 00
0.004 00
256
i Deduce the order of reaction with respect to each reactant. In each case, show your reasoning.
ii Deduce the rate equation for this reaction.
iii State the units of the rate constant, k, for this reaction.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2f4ea592-1fc2-4f80-ab2a-5dc15b87628e%2F86f81365-0c5e-4116-9e80-0152d46e4556%2Fep7hie_processed.png&w=3840&q=75)
Transcribed Image Text:Nitrogen oxides can be removed from the exhaust gases of a car engine by using a catalytic converter.
Many catalytic converters contain metals such as platinum and rhodium. These act as heterogeneous catalysts.
a i What is meant by the term heterogeneous catalysis?
ii Explain in general terms how heterogeneous catalysts work.
b Nitrogen(IV) oxide and carbon monoxide from car exhausts can react in a catalytic converter.
NO,(g) + CO(g) > NO(g) + CO,(g)
The rate equation for this reaction is
rate = k[NO,]?
Suggest a two-step reaction mechanism for this reaction that is consistent with this rate equation.
c Nitrogen(IV) oxide is formed when nitrogen(II) oxide reacts with oxygen.
2NO(g) + 0,(g) > 2NO,(g)
The table shows the data obtained from a series of experiments to investigate the kinetics of this reaction.
Experiment
[NO]/moldm-3
[0,]/mol dm-3
Initial rate / mol dm³s-1
1
0.00100
0.003 00
21.3
2
0.001 00
0.004 00
28.4
3
0.003 00
0.004 00
256
i Deduce the order of reaction with respect to each reactant. In each case, show your reasoning.
ii Deduce the rate equation for this reaction.
iii State the units of the rate constant, k, for this reaction.
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