Question

Why is the dissociation of calcium carbonate is subpressed at high pressure.

Answer 1

When heated, calcium carbonate decomposes according to the equation above. In a study of the

decomposition of calcium carbonate, a student added a 50.0 g sample of powdered CaCO3

(s) to

a 1.00 L rigid container. The student sealed the container, pumped out all the gases, then heated the

container in an oven at 1100 K. As the container was heated, the total pressure of the CO2

(g) in the

container was measured over time. The data are plotted in the graph below.

Answer 2

In the preparation of CaO from CaCO3 using the equilibrium, CaCO3(s) <------> CaO(s) + CO2(g) Log Kp = 7.282- 8500/T For complete decomposition of CaCO3, the temperature in Celsius is ? A) 1167 B) 894 C) 8500 D) 850