kp=kc(RT)delta-n .then how kp=Pco2 IN HETROGE. EQu?

As i know kc=[co2(g)] & where is delta-n goes?

Dear Student,

In the given reaction,

CaCO₃(s )→ CaO(s) + CO₂(g)

Kc is expressed as :

As CaO and CaCO₃ are pure solids, [CaO] and [CaCO₃] are constants.
Now,
Here ∆ n= 1 (Since, CaO and CaCO₃ are in solid state)

Kp= Kc (RT)^_Δn

Or, Kp= pCO₂ (PV = nRT or, P= nRT/v = CRT)

Hope it is clear to you.

Best Wishes!