Textbook Question
(c) Which step is the fastest?
Ch.14 - Chemical Kinetics
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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Table of contents
- Ch.1 - Introduction: Matter, Energy, and Measurement146
- Ch.2 - Atoms, Molecules, and Ions200
- Ch.3 - Chemical Reactions and Reaction Stoichiometry176
- Ch.4 - Reactions in Aqueous Solution155
- Ch.5 - Thermochemistry126
- Ch.6 - Electronic Structure of Atoms131
- Ch.7 - Periodic Properties of the Elements126
- Ch.8 - Basic Concepts of Chemical Bonding123
- Ch.9 - Molecular Geometry and Bonding Theories143
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces91
- Ch.12 - Solids and Modern Materials122
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics174
- Ch.15 - Chemical Equilibrium101
- Ch.16 - Acid-Base Equilibria139
- Ch.17 - Additional Aspects of Aqueous Equilibria146
- Ch.18 - Chemistry of the Environment72
- Ch.19 - Chemical Thermodynamics129
- Ch.20 - Electrochemistry142
- Ch.21 - Nuclear Chemistry101
- Ch.22 - Chemistry of the Nonmetals68
- Ch.23 - Transition Metals and Coordination Chemistry66
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry10
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Not the one you use?Change textbook
Chapter 14, Problem 68b
What is the molecularity of each of the following elementary reactions? Write the rate law for each. (b)
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Identify the given elementary reaction in part (b).
Determine the number of reactant molecules involved in the reaction. This number is the molecularity of the reaction.
Classify the reaction as unimolecular, bimolecular, or termolecular based on the number of reactant molecules.
Write the rate law for the reaction. For an elementary reaction, the rate law is directly based on the stoichiometry of the reactants.
Express the rate law using the rate constant (k) and the concentration(s) of the reactant(s) raised to the power of their stoichiometric coefficients.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Molecularity
Molecularity refers to the number of reactant molecules involved in an elementary reaction. It can be classified as unimolecular (one molecule), bimolecular (two molecules), or termolecular (three molecules). Understanding molecularity is crucial for determining how the reaction rate depends on the concentration of reactants.
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Molecular Polarity
Elementary Reaction
An elementary reaction is a single step process in a chemical reaction mechanism where reactants convert directly to products. The rate law for an elementary reaction can be directly derived from its molecularity, as the rate is proportional to the concentration of the reactants raised to the power of their coefficients in the balanced equation.
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Rate Law
The 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. For elementary reactions, the rate law reflects the stoichiometry of the reaction.
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Related Practice
Textbook Question
What is the molecularity of each of the following elementary reactions? Write the rate law for each. (b) OCl-(aq + H2O(l) → HOCl(aq) + OH-(aq)
Textbook Question
What is the molecularity of each of the following elementary reactions? Write the rate law for each. (c) NO(g) + Cl2(g) → NOCl2(g)
Textbook Question
(a) Based on the following reaction profile, how many intermediates are formed in the reaction A→D?
Textbook Question
Consider the following energy profile.
(a) How many elementary reactions are in the reaction mechanism?
Textbook Question
What is the molecularity of each of the following elementary reactions? Write the rate law for each.
(a) 2 NO(g) → N2O2(g)
(c) SO3(g) → SO2(g) + O(g)
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