Equilibrium constant: Kc, Kp, Kx
Chemical Equilibrium · Chemistry
Study notes
Write K_c and K_p for: CaCO₃(s) ⇌ CaO(s) + CO₂(g). Step 1: Omit pure solids CaCO₃ and CaO (constant concentration). Step 2: K_c = [CO₂]; K_p = p(CO₂). Step 3: Only ONE species remains — the equilibrium pressure of CO₂ is fixed at a given T. Step 4: This is why limestone has a definite decomposition pressure — the 'dissociation pressure'.