A sample of CaCO3(s) is introduced into a sealed container of volume 0.654 L and heated to 1000 K until equilibrium is reached. The Kp for the reaction CaCO3(s) ∆ CaO(s) + CO2(g) is 3.9 * 10-2 at this temperature. Calculate the mass of CaO(s) that is present at equilibriu

Explanation:

Hello,

In this case, the undergoing reaction is:

Thus, since the Kp is given, it equals the partial pressure of carbon dioxide since the equilibrium expression only consider the gaseous species, hence:

Therefore, by considering the given pressure and temperature, one computes the moles of carbon dioxide:

In such a way, carbon dioxide and calcium oxide have a 1-to-1 molar relationship, thereby, the mass of calcium oxide turns out:

Best regards.