Consider the heterogeneous equilibrium
`CaCO_3(s) hArr CaO(s) +CO_2(g) k_p=4 xx 10^(-2)` atm ……….(i)
`C(s) +CO_2(g) hArr 2CO(g) K_p=2.0` atm ………(ii)
Calculate the partial pressure of CO(g) when `CaCO_3` and C are mixed and allowed to attain equilibrium at the temperature for which the above two equilibria have been studied.

Explanation

To solve the problem, we need to find the partial pressure of CO(g) when CaCO₃(s) and C(s) are mixed and allowed to reach equilibrium. We have two equilibrium reactions with their respective equilibrium constants (Kp).

### Step-by-Step Solution:

**Step 1: Write the Equilibrium Expressions**

1. For the first equilibrium reaction:
\[
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