For the given general equation Kc & Kp
xA + yB⇄ mC + nD
where KC = equilibrium constant interms of concentration
Where KP = equilibrium constant interms of partial pressure
Kp = Kc(RT)Δn
where Δn no. of moles of gaseous products-. No. of moles of gaseous reactants.
R = gas constant
T = Temperature in Kelvin
But [CaCO3], [CaO] are taken as unity
Since CaCO3, CaO are solids
KC = [CO2]
This approach comes from kinetics, as developed by Guldberg and Waage (1863). Equilibrium is known to have reached in a physical or chemical system when the rate of forwarding and reverse processes are equal.
Rate of forwarding reaction = Rate of backward reaction
rf = rb
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