When limestone (solid CaCO,) is heated, it decomposes into lime (solid CaO) and carbon dioxide gas. This is an extremely useful industrial process of great antiquity, because powdered lime mixed with water is the basis for mortar and concrete — the lime absorbs CO, from the air and turns back into hard, durable limestone.
Suppose a limekiln of volume 350. L is pressurized with carbon dioxide gas to 12.1 atm, and heated to 710.0 °C. When the amount of CO, has stopped changing, it is found that 3.04 kg of CaCO, have appeared.
Calculate the pressure equilibrium constant K, this experiment suggests for the equilibrium between CaCO and CaO at 710.0 °C. Round your answer to 2 significant digits.
Note for advanced students: it's possible there was some error in this experiment, and the value it suggests for Kp does not match the accepted value.