Textbook Question
If πΎπ = 0.042 for PCl3(π) + Cl2(π) β PCl5(π) at 500 K, what is the value of πΎπ for this reaction at this temperature?
Ch.15 - Chemical Equilibrium
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 15, Problem 19c
Which of the following statements are true and which are false? (c) As the value of the equilibrium constant increases, the speed at which a reaction reaches equilibrium must increase.
Verified step by step guidance1
Step 1: Understand the concept of equilibrium constant (K). The equilibrium constant is a measure of the ratio of the concentrations of products to reactants at equilibrium. It does not depend on the initial concentrations of reactants or products and is only affected by temperature.
Step 2: Understand the concept of reaction rate. The speed at which a reaction reaches equilibrium is determined by the reaction rate, not the equilibrium constant. The reaction rate is influenced by factors such as temperature, concentration, and the presence of a catalyst.
Step 3: Analyze the statement. The statement suggests that as the value of the equilibrium constant increases, the speed at which a reaction reaches equilibrium must increase. This is implying a direct relationship between the equilibrium constant and the reaction rate.
Step 4: Evaluate the statement. The equilibrium constant (K) and the reaction rate are independent of each other. A larger equilibrium constant means the reaction favors the products at equilibrium, but it does not necessarily mean the reaction will reach equilibrium faster.
Step 5: Conclude the statement. Therefore, the statement is false. The speed at which a reaction reaches equilibrium (reaction rate) is not directly related to the value of the equilibrium constant.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Equilibrium Constant (K)
The equilibrium constant (K) is a numerical value that expresses the ratio of the concentrations of products to reactants at equilibrium for a reversible chemical reaction. A larger K value indicates a greater concentration of products at equilibrium, suggesting that the reaction favors product formation. However, K does not provide information about the rate at which equilibrium is achieved.
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Reaction Rate
The reaction rate refers to the speed at which reactants are converted into products in a chemical reaction. It is influenced by factors such as concentration, temperature, and the presence of catalysts. While the equilibrium constant indicates the position of equilibrium, it does not directly correlate with how quickly a reaction reaches that state.
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Dynamic Equilibrium
Dynamic equilibrium occurs in a reversible reaction when the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products. This state does not imply that the reaction has stopped; rather, it continues to occur in both directions at equal rates. The time taken to reach this equilibrium can vary independently of the equilibrium constant.
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