For CaCO3(s)⇌ΔCaO(s)+CO2(g), the equilibrium constant KC and Kp for the thermal decomposition of calcium carbonate is

For heterogeneous chemical equilibrium,CaCO3(s)⇌ΔCaO(s)+CO2(g)On the basis of the stoichiometric equation, we can write,KC=[CaO(s)]CO2(g)CaCO3(s) Since, CaCO3(s) and [CaO(s)] are both constant, therefore modified equilibrium constant for the thermal decomposition of calcium carbonate will beKC=CO2(g) or Kp=pCO2