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Question

The equilibrium constant for the reaction CaCO3(s)CaO(s)+CO2(g) is______


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Solution

Chemical equilibrium

  • In the case of chemical equilibrium, the rates of the forward and reverse reactions become equal.
  • Chemical equilibrium is dynamic in nature wherein concentrations of both reactant and product change constantly with equal speed.

Equilibrium constant:

  • For the given reaction, CaCO3(s)CalciumcarbonateCaO(s)Calciumoxide+CO2(g)Carbondioxide, the equilibrium constant can be calculated as:
  • Kc=CaOCO2CaCO3
  • For pure solids and liquids, the value of the equilibrium constant is unity.
  • So, [CaCo3]=[CO2]=unity
  • Thus, the equilibrium constant will be Kc=CO2.

Hence, the equilibrium constant for the reaction CaCO3(s)CaO(s)+CO2(g) is [CO2]


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