For $C a C O_{3} (s) ⇌ C a O (s) + C O_{2} (g), K_{c}$ is equal to :

[C O_{2}]

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[C a O]

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[C a C O_{3}]

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None of these

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Solution

The correct option is D $[C O_{2}]$
For $C a C O_{3} (s) ⇌ C a O (s) + C O_{2} (g), K_{c}$ is equal to $[C O_{2}]$
Note: The concentrations of solids calcium carbonate and calcium oxide do not appear in the equilibrium constant expression.

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The equilibrium constant for the reaction,

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C a C O_{3} (s) ⇌ C a O (s) + C O_{2} (g)

C a C O_{3 (s)} ⇌ C a O_{(s)} + C O_{2 (g)}, K_{p}

For the reaction $C a C O_{3}$ (s) $⇋$ $C a O$ (s) + $C O_{2}$ (g) the partial pressure of $C O_{2}$ (at equilibrium) depends on:

C a C O_{3} (s) ⇌ C a O (s) + C O_{2} (g); Δ n = ?

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