Consider the equilibrium reaction 2 , NO _2(g) N _2 O _4(g)

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

Problem

Consider the equilibrium reaction 2 NO2(g)⇌N2O4(g).2\,\text{NO}_2(g) \rightleftharpoons \text{N}_2\text{O}_4(g). Which of the following expressions represents the equilibrium constant KcK_c for this reaction? (a) Kc=[NO2]2[N2O4]K_c=\dfrac{[\text{NO}_2]^2}{[\text{N}_2\text{O}_4]} (b) Kc=[N2O4]2[NO2]K_c=\dfrac{[\text{N}_2\text{O}_4]}{2[\text{NO}_2]} (c) Kc=[N2O4][NO2]2K_c=\dfrac{[\text{N}_2\text{O}_4]}{[\text{NO}_2]^2} (d) Kc=[N2O4][NO2]K_c=\dfrac{[\text{N}_2\text{O}_4]}{[\text{NO}_2]}

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