The following equilibrium is established at a certain temperature: Which of the…

CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)

Problem

The following equilibrium is established at a certain temperature: 2NO2(g)  ⇌  N2O4(g)2\text{NO}_2(g)\;\rightleftharpoons\;\text{N}_2\text{O}_4(g) Which of the following gives the correct expression for the reaction quotient QcQ_c at that instant? (a) Qc=2[N2O4][NO2]2Q_c = \dfrac{2[\text{N}_2\text{O}_4]}{[\text{NO}_2]^2} (b) Qc=[N2O4][NO2]2Q_c = \dfrac{[\text{N}_2\text{O}_4]}{[\text{NO}_2]^2} (c) Qc=[NO2]2[N2O4]Q_c = \dfrac{[\text{NO}_2]^2}{[\text{N}_2\text{O}_4]} (d) Qc=[N2O4][NO2]Q_c = \dfrac{[\text{N}_2\text{O}_4]}{[\text{NO}_2]}

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