What is the equilibrium constant expression, Kc for the reaction given below? Also, what is the equilibrium constant expression, Kp in terms of pressure.
BaSO4(s)⇌BaO(s)+SO3(g)
A
Kc=[SO3],Kp=PSO3
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B
Kc=[SO3][BaO],Kp=PSO3
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C
Kc=[SO3][BaO][BaSO4],Kp=PSO3
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D
None of these
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Solution
The correct option is AKc=[SO3],Kp=PSO3 For the given equilibrium reaction,
The equilibrium constant expression, Kc=[SO3]
and the equilibrium constant expression, Kp=PSO3
Note: The concentrations of solids do not appear in the equilibrium constant expression.