AP Chemistry
7.10 Reaction Quotient and Le Châtelier’s Principle
7.9 Introduction to Le Châtelier’s Principle
7.3 Reaction Quotient and Equilibrium Constant
A rigid vessel contains an equilibrium mixture of \(\text{N}_2\text{(g)}\), \(\text{O}_2\text{(g)}\), and \(\text{NO(g)}\) at an initial temperature of \(800\text{ K}\), according to the endothermic reaction represented below.
\[ \text{N}_2\text{(g)} + \text{O}_2\text{(g)} \rightleftharpoons 2\,\text{NO(g)} \quad \Delta H^\circ = +180\text{ kJ/mol}_{\text{rxn}} \]
The temperature of the container is rapidly lowered to \(600\text{ K}\) while the volume remains constant. Which of the following statements best describes the relationship between the reaction quotient, \(Q_p\), and the new equilibrium constant, \(K_p\), immediately after the temperature change, and correctly predicts the direction the system will shift to re-establish equilibrium?
\[ \text{N}_2\text{(g)} + \text{O}_2\text{(g)} \rightleftharpoons 2\,\text{NO(g)} \quad \Delta H^\circ = +180\text{ kJ/mol}_{\text{rxn}} \]
The temperature of the container is rapidly lowered to \(600\text{ K}\) while the volume remains constant. Which of the following statements best describes the relationship between the reaction quotient, \(Q_p\), and the new equilibrium constant, \(K_p\), immediately after the temperature change, and correctly predicts the direction the system will shift to re-establish equilibrium?
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