Briefly explain why neither nor appears in the equilibrium-constant expression for .

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

Problem

Briefly explain why neither CaCO3(s)\mathrm{CaCO_3}(s) nor CaO(s)\mathrm{CaO}(s) appears in the equilibrium-constant expression for CaCO3(s)⇌CaO(s)+CO2(g)\mathrm{CaCO_3}(s)\rightleftharpoons\mathrm{CaO}(s)+\mathrm{CO_2}(g).

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