교과서 질문
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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15. Chemical Equilibrium
Le Chatelier's Principle
1:11분문제 50
교과서 질문
Why do catalysts not alter the amounts of reactants and products present at equilibrium?
검증된 단계별 안내1
Understand that a catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.
Recognize that catalysts work by providing an alternative reaction pathway with a lower activation energy, which speeds up both the forward and reverse reactions equally.
Recall that equilibrium is a state where the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products.
Note that since a catalyst affects both the forward and reverse reactions equally, it does not change the position of equilibrium; it only helps the system reach equilibrium faster.
Conclude that because the position of equilibrium is determined by the relative energies of reactants and products, and not by the pathway taken to reach equilibrium, a catalyst does not alter the amounts of reactants and products present at equilibrium.
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1m주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Chemical Equilibrium
Chemical equilibrium occurs when the rates of the forward and reverse reactions in a chemical process are equal, resulting in constant concentrations of reactants and products. At this state, the system is dynamic, meaning that reactions continue to occur, but there is no net change in the amounts of substances involved.
추천 영상:
가이드 코스
03:42
Chemical Equilibrium Concept 1
Catalysts
Catalysts are substances that increase the rate of a chemical reaction without being consumed in the process. They work by lowering the activation energy required for the reaction to occur, allowing reactants to convert to products more efficiently. However, they do not affect the position of equilibrium or the final concentrations of reactants and products.
추천 영상:
가이드 코스
02:16Rate of Reaction Concept 7
Le Chatelier's Principle
Le Chatelier's Principle states that if a system at equilibrium is subjected to a change in concentration, temperature, or pressure, the system will adjust to counteract that change and restore a new equilibrium. Since catalysts do not change the energy levels of reactants or products, they do not shift the equilibrium position, thus leaving the amounts of reactants and products unchanged.
추천 영상:
가이드 코스
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
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