Domanda del libro di testo
The following pictures represent the composition of the equi- librium mixture for the reaction A + B ∆ AB at 300 K and at 400 K. Is the reaction exothermic or endothermic? Explain using Le Châtelier's principle.
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Ch.15 - Chemical Equilibrium
McMurry8th EditionChemistryISBN: 9781292336145
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TOC.tableOfContents
- Ch.1 - Chemical Tools: Experimentation & Measurement170
- Ch.2 - Atoms, Molecules & Ions160
- Ch.3 - Mass Relationships in Chemical Reactions169
- Ch.4 - Reactions in Aqueous Solution199
- Ch.5 - Periodicity & Electronic Structure of Atoms102
- Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory92
- Ch.7 - Covalent Bonding and Electron-Dot Structures61
- Ch.8 - Covalent Compounds: Bonding Theories and Molecular Structure59
- Ch.9 - Thermochemistry: Chemical Energy122
- Ch.10 - Gases: Their Properties & Behavior155
- Ch.11 - Liquids & Phase Changes54
- Ch.12 - Solids and Solid-State Materials73
- Ch.13 - Solutions & Their Properties120
- Ch.14 - Chemical Kinetics98
- Ch.15 - Chemical Equilibrium125
- Ch.16 - Aqueous Equilibria: Acids & Bases110
- Ch.17 - Applications of Aqueous Equilibria147
- Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium86
- Ch.19 - Electrochemistry154
- Ch.20 - Nuclear Chemistry96
- Ch.21 - Transition Elements and Coordination Chemistry156
- Ch.22 - The Main Group Elements187
- Ch.23 - Organic and Biological Chemistry51
Capitolo 15, Problema 50
The following pictures represent the initial and equilibrium states for the exothermic decomposition of gaseous A mol- ecules (red) to give gaseous B molecules (blue). (b) Will the number of A molecules in the equilibrium mix- ture increase, decrease, or remain the same after each of the following changes? Explain. (3) Increasing the pressure by adding an inert gas
Guida verificata passo dopo passo1
Identify the reaction: The problem involves the exothermic decomposition of gaseous A molecules into gaseous B molecules.
Understand the effect of adding an inert gas: Adding an inert gas at constant volume does not change the partial pressures of the reacting gases, as it does not participate in the reaction.
Apply Le Chatelier's Principle: Since the inert gas does not affect the partial pressures of A or B, the equilibrium position is not shifted by the addition of the inert gas.
Consider the number of moles: The total pressure increases, but the partial pressures of A and B remain unchanged, so the equilibrium concentrations of A and B remain the same.
Conclude: The number of A molecules in the equilibrium mixture will remain the same after adding an inert gas.
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Le Chatelier's Principle
Le Chatelier's Principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change. In the context of gaseous reactions, this principle helps predict how changes in pressure, temperature, or concentration will affect the equilibrium state.
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Percorso guidato
07:32
Le Chatelier's Principle
Effect of Inert Gases on Equilibrium
Adding an inert gas at constant volume does not change the partial pressures of the reactants or products in a reaction at equilibrium. Since the inert gas does not participate in the reaction, it does not affect the equilibrium position directly, but it can influence the total pressure of the system.
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Percorso guidato
02:31Photoelectric Effect
Exothermic Reactions and Equilibrium
In exothermic reactions, heat is released as a product. When considering changes in temperature or pressure, the equilibrium will shift in a direction that either absorbs heat (endothermic) or releases heat (exothermic) to maintain balance. Understanding this helps predict how the equilibrium will respond to changes in conditions.
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Percorso guidato
02:38Endothermic & Exothermic Reactions
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