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

Answer: 

The equilibrium constant for the reaction CaCO3(s) ⇌ CaO(s) + CO2 (g) is Kc= [CO2]

The equilibrium reaction is

CaCO3(s) ⇌ CaO(s) + CO2 (g)

The equilibrium constant can be expressed as

[latex]K_{c}= \frac{[CaO][CO_{2}]}{[CaCO_{3}]}[/latex]

Molar concentration of pure solids or liquids is constant.

[CaCO3(s)] = [CaO(s)] = 1

∴ Kc = [CO2]

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