A 34.50 g piece of limestone is placed into a 1.50 L container and heated until the solid fully composes. Whats the final pressure in the container when the temperature of the container is 25.0 °C

Answer 1

Limestone = calcium carbonate = CaCO₃

Write the balanced equation for the reaction taking place:

CaCO₃ + heat ==> CaO + CO₂

Next, find the moles of CO₂ produced:

34.50 g CaCO₃ x 1 mol CaCO₃ / 100.1 g x 1 mol CO₂ / mol CaCO₃ = 0.3447 moles CO₂

Now use the ideal gas law to find the pressure:

PV = nRT

P = nRT / V

P = (0.3447 mol)(0.0821 Latm/Kmol)(298K) / 1.50 L

P = 5.62 atm