Chemistry: An Atoms First Approach
2nd Edition
ISBN: 9781305079243
Author: Steven S. Zumdahl, Susan A. Zumdahl
Publisher: Cengage Learning
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Chapter 11, Problem 77E
Interpretation Introduction
Interpretation: The product of the reaction of
Concept introduction The compounds containing multiple
To predict: The product of the reaction of
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5. For the chlorination of ethane, represented by the equation: CH3CH3 + Cl2 + hv→ CH3CH2CI + HCI, the following
radical-mediated mechanism has been proposed:
Cl2 2 Cl· + CI -
CH4 + Cl. → CH3· + HCI
CH3: + Cl2 → CH3CI + Cl·
k1, k.1
k2
k3
CH3* + Cl· 2CH3CI
ka, k.4
Additionally, it has been possible to establish, under certain experimental conditions, that the reaction is first
order with respect to the methane, and three halves with respect to chlorine.
a) Classify the different steps of this mechanism (i.e. initiation, propagation, etc.).
b) Derive the rate law for the chlorination of ethane, based on the mechanism proposed.
c) Identify which is the rate-determining step. Justify your selection.
d) Indicate which are the assumptions and approximations you used so that this model could work (i.e. pre-
equilibrium condition, steady state approximation, neglecting the contribution of a step, etc.).
In unpolluted air at 300 K, the hydroxyl radical OH reacts
with CO with a bimolecular rate constant of 1.6 × 101' L
mol-1 s-1 and with CH4 with a rate constant of 3.8 ×
10° L mol¬1 s-1. Take the partial pressure of CO in air to
be constant at 1.0 × 10-7 atm and that of CH4 to be 1.7 x
10-6 atm, and assume that these are the primary mecha-
nisms by which OH is consumed in the atmosphere. Cal-
culate the half-life of OH under these conditions.
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N2O5 (g) → NO3 (g) + NO2(g)
Time (s) [N2O5] (M)
1.000
25
0.822
50
0.677
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0.557
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0.458
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0.377
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0.310
175
0.255
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0.210
Chapter 11 Solutions
Chemistry: An Atoms First Approach
Ch. 11 - Define reaction rate. Distinguish between the...Ch. 11 - Distinguish between the differential rate law and...Ch. 11 - One experimental procedure that can be used to...Ch. 11 - The initial rate for a reaction is equal to the...Ch. 11 - Prob. 5RQCh. 11 - Derive expressions for the half-life of zero-,...Ch. 11 - Prob. 7RQCh. 11 - Prob. 8RQCh. 11 - Prob. 9RQCh. 11 - Give the Arrhenius equation. Take the natural log...
Ch. 11 - Why does a catalyst increase the rate of a...Ch. 11 - Prob. 1ALQCh. 11 - Describe at least two experiments you could...Ch. 11 - Prob. 3ALQCh. 11 - Prob. 4ALQCh. 11 - Consider the following statements: In general, the...Ch. 11 - For the reaction A + B C, explain at least two...Ch. 11 - Prob. 7ALQCh. 11 - Prob. 8ALQCh. 11 - Prob. 9ALQCh. 11 - Prob. 10QCh. 11 - Prob. 11QCh. 11 - The plot below shows the number of collisions with...Ch. 11 - For the reaction O2(g)+2NO(g)2NO2(g) the observed...Ch. 11 - Prob. 14QCh. 11 - Prob. 15QCh. 11 - Prob. 16QCh. 11 - Prob. 17QCh. 11 - Prob. 18QCh. 11 - Prob. 19QCh. 11 - Consider the following energy plots for a chemical...Ch. 11 - Prob. 21QCh. 11 - Would the slope of a ln(k) versus 1/T plot (with...Ch. 11 - Prob. 23ECh. 11 - In the Haber process for the production of...Ch. 11 - At 40C, H2O2 (aq) will decompose according to the...Ch. 11 - Consider the general reaction aA+bBcC and the...Ch. 11 - What are the units for each of the following if...Ch. 11 - The rate law for the reaction...Ch. 11 - The reaction 2NO(g)+Cl2(g)2NOCl(g) was studied at...Ch. 11 - The reaction 2I-(aq)+S2O82-(aq)I2(aq)+2SO42-(aq)...Ch. 11 - The decomposition of nitrosyl chloride was...Ch. 11 - The following data were obtained for the gas-phase...Ch. 11 - The reaction I(aq)+OCl(aq)IO(aq)+Cl(aq) was...Ch. 11 - The reaction 2NO(g)+O2(g)2NO2(g) was studied. and...Ch. 11 - The rote of the reaction between hemoglobin (Hb)...Ch. 11 - The following data were obtained for the reaction...Ch. 11 - The decomposition of hydrogen peroxide was...Ch. 11 - Prob. 38ECh. 11 - The rate of the reaction NO2(g)+CO(g)NO(g)+CO2(g)...Ch. 11 - A certain reaction has the following general form:...Ch. 11 - The decomposition of ethanol (C2H5OH) on an...Ch. 11 - Prob. 42ECh. 11 - The dimerization of butadiene 2C4H6(g)C8H12(g) was...Ch. 11 - The rate of the reaction O(g)+NO2(g)NO(g)+O2(g)...Ch. 11 - Experimental data for the reaction A2B+C have been...Ch. 11 - Prob. 46ECh. 11 - The reaction AB+C is known to be zero order in A...Ch. 11 - The decomposition of hydrogen iodide on finely...Ch. 11 - Prob. 49ECh. 11 - A first-order reaction is 75.0% complete in 320....Ch. 11 - The rate law for the decomposition of phosphine...Ch. 11 - DDT (molar mass = 354.49 g/mol) was a widely used...Ch. 11 - Consider the following initial rate data for the...Ch. 11 - Prob. 54ECh. 11 - Prob. 55ECh. 11 - Prob. 56ECh. 11 - You and a coworker have developed a molecule...Ch. 11 - Consider the hypothetical reaction A+B+2C2D+3E...Ch. 11 - Prob. 59ECh. 11 - A possible mechanism for the decomposition of...Ch. 11 - A proposed mechanism for a reaction is...Ch. 11 - The mechanism for the gas-phase reaction of...Ch. 11 - For the following reaction profile, indicate a....Ch. 11 - Draw a rough sketch of the energy profile for each...Ch. 11 - Prob. 65ECh. 11 - The activation energy for some reaction...Ch. 11 - The rate constant for the gas-phase decomposition...Ch. 11 - The reaction (CH3)3CBr+OH(CH3)3COH+Br in a certain...Ch. 11 - Prob. 69ECh. 11 - A first-order reaction has rate constants of 4.6 ...Ch. 11 - Prob. 71ECh. 11 - Prob. 72ECh. 11 - Which of the following reactions would you expect...Ch. 11 - Prob. 74ECh. 11 - One mechanism for the destruction of ozone in the...Ch. 11 - One of the concerns about the use of Freons is...Ch. 11 - Prob. 77ECh. 11 - The decomposition of NH3 to N2 and H2 was studied...Ch. 11 - The decomposition of many substances on the...Ch. 11 - Prob. 80ECh. 11 - Prob. 81ECh. 11 - Prob. 82ECh. 11 - Consider the following representation of the...Ch. 11 - The reaction H2SeO3(aq) + 6I-(aq) + 4H+(aq) Se(s)...Ch. 11 - Prob. 85AECh. 11 - Sulfuryl chloride (SO2Cl2) decomposes to sulfur...Ch. 11 - For the reaction 2N2O5(g)4NO2(g)+O2(g) the...Ch. 11 - Prob. 88AECh. 11 - Cobra venom helps the snake secure food by binding...Ch. 11 - Iodomethane (CH3I) is a commonly used reagent in...Ch. 11 - Experiments during a recent summer on a number of...Ch. 11 - The activation energy of a certain uncatalyzed...Ch. 11 - Consider the reaction 3A+B+CD+E where the rate law...Ch. 11 - The thiosulfate ion (S2O32) is oxidized by iodine...Ch. 11 - The reaction A(aq)+B(aq)products(aq) was studied,...Ch. 11 - A certain substance, initially present at 0.0800...Ch. 11 - A reaction of the form aAProducts gives a plot of...Ch. 11 - A certain reaction has the form aAProducts At a...Ch. 11 - Which of the following statement(s) is( are) true?...Ch. 11 - Consider the hypothetical reaction A2(g) + B2(g) ...Ch. 11 - Experiments have shown that the average frequency...Ch. 11 - Consider a reaction of the type aA products, in...Ch. 11 - A study was made of the effect of the hydroxide...Ch. 11 - Two isomers (A and B) of a given compound dimerize...Ch. 11 - Prob. 105CPCh. 11 - Most reactions occur by a series of steps. The...Ch. 11 - Prob. 107CPCh. 11 - The decomposition of NO2(g) occurs by the...Ch. 11 - The following data were collected in two studies...Ch. 11 - Prob. 110CPCh. 11 - Prob. 111CPCh. 11 - Prob. 112CPCh. 11 - Sulfuryl chloride undergoes first-order...Ch. 11 - Upon dissolving InCl(s) in HCl, In+(aq) undergoes...Ch. 11 - The decomposition of iodoethane in the gas phase...Ch. 11 - Consider the following reaction: CH3X+YCH3Y+X At...
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