The endothermic decomposition is at equilibrium in a rigid

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

Problem

The endothermic decomposition CaCO3(s)  ⇌  CaO(s)+CO2(g)(ΔH>0)\mathrm{CaCO_3(s)\;\rightleftharpoons\;CaO(s)+CO_2(g)}\qquad (\Delta H>0) is at equilibrium in a rigid, sealed container. Consider the following four independent changes. A. Heat the container by 15 K15\,\mathrm{K}. B. Instantaneously double the container volume. C. Remove a small amount of CO2(g)\mathrm{CO_2(g)} with a syringe. D. Add additional solid CaCO3\mathrm{CaCO_3}. Rank the changes from greatest to least increase in the partial pressure of CO2(g)\mathrm{CO_2(g)} at the new equilibrium. Combine any ties.

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