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Ch.16 - Chemical Equilibrium
All textbooksTro 5th EditionCh.16 - Chemical EquilibriumProblem 64a
Chapter 16, Problem 64a

Consider this reaction at equilibrium: 2 BrNO(g) ⇌ 2 NO(g) + Br2(g) Predict whether the reaction will shift left, shift right, or remain unchanged after each disturbance. a. NO is added to the reaction mixture.

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Identify the reaction and the change applied: The reaction given is 2 BrNO(g) ⇌ 2 NO(g) + Br2(g), and the disturbance is the addition of NO(g) to the reaction mixture.
Recall Le Chatelier's Principle, which states that if a system at equilibrium is disturbed, it will adjust itself to counteract the disturbance and restore a new equilibrium.
Analyze the effect of adding NO(g): Adding more NO(g) increases the concentration of NO(g) on the right side of the equation.
Predict the shift due to the disturbance: According to Le Chatelier's Principle, increasing the concentration of a product (NO(g)) will shift the equilibrium to the left to reduce the concentration of NO(g) by converting it back to BrNO(g).
Conclude the direction of the shift: The reaction will shift to the left in response to the addition of NO(g).

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

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 the direction of the shift in equilibrium when a reactant or product concentration is altered.
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Le Chatelier's Principle

Equilibrium Constant (K)

The equilibrium constant (K) is a numerical value that expresses the ratio of the concentrations of products to reactants at equilibrium for a given reaction at a specific temperature. Changes in concentration, pressure, or temperature can affect the value of K, influencing the position of equilibrium.
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Reaction Quotient (Q)

The reaction quotient (Q) is a measure of the relative concentrations of products and reactants at any point in time, not just at equilibrium. By comparing Q to K, one can determine the direction in which the reaction will shift to reach equilibrium: if Q < K, the reaction shifts right; if Q > K, it shifts left.
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Related Practice
Textbook Question

Consider the reaction: A(g) ⇌ B(g) + C(g) Find the equilibrium concentrations of A, B, and C for each value of Kc. Assume that the initial concentration of A in each case is 1.0 M and that the reaction mixture initially contains no products. Make any appropriate simplifying assumptions. b. Kc = 0.010

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Textbook Question

Consider this reaction at equilibrium: 2 BrNO(g) ⇌ 2 NO(g) + Br2(g) Predict whether the reaction will shift left, shift right, or remain unchanged after each disturbance. b. BrNO is added to the reaction mixture.

Textbook Question

Consider this reaction at equilibrium: 2 BrNO(g) ⇌ 2 NO(g) + Br2(g) Predict whether the reaction will shift left, shift right, or remain unchanged after each disturbance. c. Br2 is removed from the reaction mixture.

Textbook Question

Consider this reaction at equilibrium: C(s) + H2O(g) ⇌ CO(g) + H2(g) Predict whether the reaction will shift left, shift right, or remain unchanged after each disturbance. a. C is added to the reaction mixture. b. H2O is condensed and removed from the reaction mixture. Predict whether the reaction will shift left, shift right, or remain unchanged after each disturbance. c. CO is added to the reaction mixture. d. H2 is removed from the reaction mixture.