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Ch.15 - Chemical Equilibrium
Tro - Chemistry: A Molecular Approach 4th Edition
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Tro 4th EditionCh.15 - Chemical Equilibrium문제 24
15장, 문제 24

Ethene (C2H4) can be halogenated by this reaction: C2H4(g) + X2(g) ⇌ C2H4X2(g) where X2 can be Cl2 (green), Br2 (brown), or I2 (purple). Examine the three figures representing equilibrium concentrations in this reaction at the same temperature for the three different hal- ogens. Rank the equilibrium constants for the three reactions from largest to smallest.
Three diagrams showing equilibrium concentrations of C2H4 with Cl2, Br2, and I2.

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Identify the species in each diagram: A (red) represents C2H4, B (green) represents X2, and C (blue), D (orange), E (gray) represent C2H4X2 for Cl2, Br2, and I2 respectively.
Count the number of each species in each diagram to determine the equilibrium concentrations.
Calculate the equilibrium constant (K) for each reaction using the formula K = [C2H4X2] / ([C2H4] * [X2]).
Compare the calculated equilibrium constants for the three reactions.
Rank the equilibrium constants from largest to smallest based on the calculated values.

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주요 개념

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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 larger K value indicates a greater concentration of products compared to reactants, suggesting that the reaction favors product formation. In the context of halogenation of ethene, comparing K values for Cl2, Br2, and I2 will reveal which halogen leads to a more favorable reaction.
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가이드 코스
01:14
Equilibrium Constant K

Halogen Reactivity

Halogens vary in their reactivity, which influences the rate and extent of reactions with alkenes like ethene. Chlorine (Cl2) is generally more reactive than bromine (Br2), which in turn is more reactive than iodine (I2). This trend affects the equilibrium position of the halogenation reaction, with more reactive halogens typically leading to higher equilibrium constants.
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가이드 코스
01:11
Halogenation Reactions

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. In the context of the halogenation of ethene, if the concentration of one of the halogens is increased, the equilibrium will shift to favor the formation of products, thereby affecting the equilibrium constant and the concentrations of the reactants and products.
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07:32
Le Chatelier's Principle
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