Consider the gas-phase equilibrium 3 , A(g) B(g) + 2 , C(g) K_c=1.2 10^ 4

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

Problem

Consider the gas-phase equilibrium 3 A(g)⇌B(g)+2 C(g)Kc=1.2×104.3\,\mathrm{A(g)} \rightleftharpoons \mathrm{B(g)} + 2\,\mathrm{C(g)}\qquad K_c=1.2\times10^{4}. If the system starts with equimolar amounts of A, B, and C and then reaches equilibrium at the same temperature, which single species (A, B, or C) is expected to be present in the greatest amount? Justify your prediction in two or three sentences.

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