Chemistry · EQUILIBRIUM

At \( 1100\text{ K} \), the thermal decomposition of calcium carbonate \( \text{CaCO}_3(\text{s}) \rightleftharpoons \text{CaO}(\text{s}) + \text{CO}_2(\text{g}) \) has an equilibrium pressure of \( \text{CO}_2 \) equal to \( 2.0 \times 10^5\text{ Pa} \). In standard state pressure (\( 1\text{ bar} = 10^5\text{ Pa} \)), the dimensionless value of \( K_p \) is:

1. A
   \( 0.50 \)
2. B
   \( 1.00 \)
3. C
   \( 4.00 \)
4. D
   \( 2.00 \)