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As per your syllabus, for the heterogeneous equilibrium CaCO₃(s) ⇌ CaO(s) + CO₂(g), the equilibrium constant Kp equals which?
A1 / p(CO₂)
Bp(CaO) × p(CO₂) / p(CaCO₃)
Cp(CO₂)²
Dp(CO₂)
Answer & Solution
Correct answer: D. p(CO₂)
syllabus eqn 6.18: pure solids drop out of Kp.
Only the gaseous CO₂ partial pressure appears.
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