Connect for Chemistry
13th Edition
ISBN: 9781260161854
Author: Raymond Chang, Jason Overby
Publisher: Mcgraw-hill Higher Education (us)
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Textbook Question
Chapter 13, Problem 13.88QP
The rate law for the reaction 2NO2 (g) → N2O4(g) is rate = k[NO2]2. Which of the following changes will change the value of k? (a) The pressure of NO2 is doubled. (b) The reaction is run in an organic solvent. (c) The volume of the container is doubled. (d) The temperature is decreased. (e) A catalyst is added to the container.
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When the rate of the reversible reaction A + BSC is
studied under a certain set of conditions, it is found that
the rate of the forward reaction is kA]. What can be
concluded about the rate law for the reverse reaction
under these conditions?
(A) Rate = k-[C]
%3D
(B) Rate = k
[B]
(C) The rate law of the reverse reaction cannot be
determined from the information given.
(D) An crror must have been made, since if the reaction
is reversible, the forward rate law must be
Rate = k{A][B].
%3D
Assume that the formation of nitrogen dioxide:
2NO(g) + O2(g)
2NO2(g)
is an elementary reaction. (a) Write the rate law for this
reaction. (b) A sample of air at a certain temperature is
contaminated with 2.0 ppm of NO by volume. Under
these conditions, can the rate law be simplified? If so,
write the simplified rate law. (c) Under the conditions
described in part (b), the half-life of the reaction has been
estimated to be 6.4 × 103 min. What would the half-life
be if the initial concentration of NO were 10 ppm?
The reaction O₂(g) + 2 NO(g) → 2 NO₂(g) was studied at a certain temperature with the following results:
(a) What is the rate law for this reaction?
O Ratek [0₂(9)] [NO(g)]
O Ratek [0₂(9)]² [NO(g)]
O Rate = k [0₂(9)] [NO(g)]²
O Ratek [0₂(9)]² [NO(g)]²
O Ratek [0₂(9)] [NO(g)]³
O Rate = k [O₂(g)]* [NO(g)]
(b) What is the value of the rate constant?
Experiment
[0₂(9)] (M)
0.0235
0.0235
0.0470
0.0470
[NO(g)] (M)
0.0235
0.0470
0.0235
0.0470
Rate (M/S)
0.158
0.633
0.317
1.27
(c) What is the reaction rate when the concentration of O₂(g) is 0.0318 M and that of NO(g) is 0.0649 M if the temperature is the same as that used to obtain the data shown above?
Chapter 13 Solutions
Connect for Chemistry
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