Textbook Question
Under certain conditions, the bromination of cyclohexene follows an unusual rate law:
c. What is the overall kinetic order?
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Ch.4 - The Study of Chemical Reactions
Wade9th EditionOrganic ChemistryISBN: 9780135213728
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Table of contents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
Chapter 4, Problem 12b
Under certain conditions, the bromination of cyclohexene follows an unusual rate law:
b. What is the kinetic order with respect to bromine?
Verified step by step guidance1
Step 1: Understand the rate law provided in the problem. The rate law is given as rate = k_r[cyclohexene][Br2]^2, where k_r is the rate constant, [cyclohexene] is the concentration of cyclohexene, and [Br2] is the concentration of bromine.
Step 2: Recall the definition of kinetic order with respect to a reactant. The kinetic order is the exponent of the concentration term for that reactant in the rate law. It indicates how the rate of reaction depends on the concentration of that reactant.
Step 3: Identify the exponent of [Br2] in the rate law. In this case, the exponent of [Br2] is 2, as shown in the rate law.
Step 4: Conclude that the kinetic order with respect to bromine (Br2) is determined by this exponent. Therefore, the kinetic order with respect to bromine is 2.
Step 5: Note that the overall reaction order can be calculated by summing the exponents of all reactants in the rate law, but for this specific question, we are only concerned with the kinetic order of bromine.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Kinetics of Reactions
Chemical kinetics is the study of the rates of chemical reactions and the factors that affect them. It involves understanding how concentration, temperature, and catalysts influence the speed of a reaction. In this case, the rate law indicates how the concentration of reactants affects the rate of bromination of cyclohexene.
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Rate Law
A rate law expresses the relationship between the rate of a chemical reaction and the concentration of its reactants. It is typically formulated as rate = k[A]^m[B]^n, where k is the rate constant, and m and n are the orders of the reaction with respect to reactants A and B. The given rate law for the bromination of cyclohexene shows that the reaction is second order with respect to bromine.
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Order of Reaction
The order of a reaction refers to the power to which the concentration of a reactant is raised in the rate law. It indicates how the rate of reaction changes with varying concentrations of reactants. In this scenario, the rate law suggests that the reaction is first order with respect to cyclohexene and second order with respect to bromine, meaning that doubling the concentration of bromine will quadruple the reaction rate.
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Related Practice
Textbook Question
When a small piece of platinum is added to a mixture of ethene and hydrogen, the following reaction occurs: Ethene
Doubling the concentration of hydrogen has no effect on the reaction rate. Doubling the concentration of ethene also has no effect.
a. What is the kinetic order of this reaction with respect to ethene? With respect to hydrogen? What is the overall order?
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Textbook Question
When a small piece of platinum is added to a mixture of ethene and hydrogen, the following reaction occurs:
Doubling the concentration of hydrogen has no effect on the reaction rate. Doubling the concentration of ethene also has no effect.
b. Write the unusual rate equation for this reaction.
c. Explain this strange rate equation, and suggest what one might do to accelerate the reaction.
801
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Textbook Question
The reaction of tert-butyl chloride with methanol
is found to follow the rate equation
rate = kr[(CH3)3C—Cl]
c. What is the kinetic order overall
1547
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Textbook Question
The reaction of tert-butyl chloride with methanol
is found to follow the rate equation
rate = kr[(CH3)3C—Cl]
b. What is the kinetic order with respect to methanol?
1281
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Textbook Question
Under certain conditions, the bromination of cyclohexene follows an unusual rate law:
a. What is the kinetic order with respect to cyclohexene?
1847
views