Textbook Question
The following diagrams represent two similar reactions that have achieved equilibrium:
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a. Write the expression for the equilibrium constant for each reaction.
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Ch.7 Chemical Reactions: Energy, Rate and Equilibrium
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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Table of contents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Not the one you use?Change textbook
Chapter 7, Problem 12c
Do the following reactions favor reactants or products at equilibrium? Give relative concentrations at equilibrium.
c. Fe2O3(s) + 3 CO(g) ⇌ 2 Fe(s) + 3 CO2(g) K (at 727 °C) = 24.2
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Identify the equilibrium constant (K) provided in the problem. Here, K = 24.2 at 727 °C. The equilibrium constant indicates the ratio of the concentrations of products to reactants at equilibrium.
Interpret the value of K. Since K > 1 (24.2 is greater than 1), the reaction favors the formation of products at equilibrium. This means that the concentration of products will be higher than the concentration of reactants at equilibrium.
Recognize the states of matter in the reaction. Solids (Fe2O3 and Fe) do not appear in the equilibrium expression because their concentrations are constant and do not affect the equilibrium position.
Write the equilibrium expression for the reaction: . This expression only includes the gaseous species CO and CO2.
Conclude that at equilibrium, the concentration of CO2 (a product) will be relatively higher than the concentration of CO (a reactant), as the reaction favors the products due to the large K value.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Chemical Equilibrium
Chemical equilibrium occurs when the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products. At this point, the system is in a state of balance, and the concentrations of all species remain unchanged over time. Understanding this concept is crucial for analyzing how changes in conditions affect the position of equilibrium.
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03:42
Chemical Equilibrium Concept 1
Equilibrium Constant (K)
The equilibrium constant (K) quantifies the ratio of the concentrations of products to reactants at equilibrium for a given reaction at a specific temperature. A large K value (greater than 1) indicates that products are favored at equilibrium, while a small K value (less than 1) suggests that reactants are favored. In this case, K = 24.2 implies a significant preference for the formation of products.
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02:50The Equilibrium Constant Concept 1
Le Chatelier's Principle
Le Chatelier's Principle states that if a dynamic equilibrium is disturbed by changing the conditions, the system will adjust to counteract the change and restore a new equilibrium. This principle helps predict how changes in concentration, pressure, or temperature will affect the position of equilibrium, providing insight into the relative concentrations of reactants and products.
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09:34The following is an endothermic reaction where Kc = 6.73 x 103.For each of the choices below predict in which direction the reaction will proceed
Related Practice
Textbook Question
Does entropy increase or decrease in the following processes?
a. Polymeric complex carbohydrates are metabolized by the body, converted into smaller simple sugars.
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Textbook Question
The following diagrams represent two similar reactions that have achieved equilibrium:
<IMAGE>
b. Calculate the value for the equilibrium constant for each reaction.
2
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Textbook Question
Do the following reactions favor reactants or products at equilibrium? Give relative concentrations at equilibrium.
a. Sucrose(aq) + H2O(l) ⇌ Glucose(aq) + Fructose(aq) K = 1.4 × 105
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Textbook Question
Does entropy increase or decrease in the following processes?
c. 2 SO2(g) + O2(g) → 2 SO3(g)
Textbook Question
Is the yield of SO3 at equilibrium favored by a higher or lower pressure? By a higher or lower temperature?
2 SO2(g) + O2 ⇌ 2 SO3(g) ∆H = -47 kcal/mol
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