For the gas-phase reaction an equilibrium constant is tabulated at a given temperature

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

Problem

For the gas-phase reaction 2X(g)⇌Y(g)2X(g) \rightleftharpoons Y(g) an equilibrium constant KK is tabulated at a given temperature. Which expression gives the equilibrium constant for the reaction written as X(g)⇌12Y(g)X(g) \rightleftharpoons \tfrac12 Y(g) ? (a) 1K\dfrac{1}{\sqrt{K}} (b) K\sqrt{K} (c) K2K^{2} (d) KK

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