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Ch.15 - Chemical Equilibrium
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145당신이 사용하는 게 아니라요?교과서 변경
모든 교과서McMurry 8th EditionCh.15 - Chemical Equilibrium문제 48
15장, 문제 48

The following picture represents the composition of the equi- librium mixture for the endothermic reaction A2 ∆ 2 A at 500 K. Draw a picture that represents the equilibrium mixture after each of the following changes. (b) Increasing the volumeEquilibrium mixture of pink spheres representing reactants A2 and products A at 500 K.
Three images showing equilibrium mixtures after changes: (i) initial, (ii) after volume increase, (iii) final state.
Image showing equilibrium mixture after further changes, labeled (iv).

검증된 단계별 안내
1
Identify the initial equilibrium mixture (image (i)) where the reaction A2 ⇌ 2A is at equilibrium.
Recognize that increasing the volume of the system will decrease the pressure.
According to Le Chatelier's principle, the system will shift to counteract this change by favoring the side with more gas molecules.
In this case, the reaction will shift towards the production of more A atoms (since 2A has more molecules than A2).
Draw the new equilibrium mixture (image (ii)) showing an increased number of A atoms and a decreased number of A2 molecules.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
5m

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

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 the reaction A2 ⇌ 2A, increasing the volume of the system will favor the side with more moles of gas, which in this case is the product side (2A), thus shifting the equilibrium to the right.
추천 영상:
가이드 코스
07:32
Le Chatelier's Principle

Endothermic Reactions

An endothermic reaction is one that absorbs heat from its surroundings. In the reaction A2 ⇌ 2A, the forward reaction is endothermic, meaning that increasing the temperature will also favor the formation of products. Understanding this concept is crucial when predicting how changes in temperature and volume affect the equilibrium position.
추천 영상:
가이드 코스
02:30
Endothermic & Exothermic Reactions

Equilibrium Mixture

An equilibrium mixture refers to the state in a reversible reaction where the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products. In the given reaction, the equilibrium mixture at 500 K consists of both A2 and A, and any changes in conditions, such as volume, will alter the concentrations of these species until a new equilibrium is established.
추천 영상:
가이드 코스
02:38
Equilibrium Constant Calculation
관련 실천
교과서 질문
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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교과서 질문
Consider the reaction A + B ∆ AB. The vessel on the right contains an equilibrium mixture of A molecules (red spheres), B molecules (blue spheres), and AB molecules. If the stopcock is opened and the contents of the two vessels are allowed to mix, will the reaction go in the forward or reverse direction? Explain.

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교과서 질문
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
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교과서 질문

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). (a) Write a balanced chemical equation for the reaction.

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교과서 질문

The following pictures represent the initial state and the equilibrium state for the reaction of A2 molecules (red) with B atoms (blue) to give AB molecules. (a) Write a balanced chemical equation for the reaction.

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교과서 질문
The following picture represents the equilibrium state for the reaction 2 AB ∆ A2 + B2. Which rate constant is larger, kf or kr? Explain.
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