CaCO3 (s) 2 CaO (s) + CO2 (g) When heated strongly, solid calcium carbonate decomposes to produce solid calcium oxide and carbon dioxide gas, as represented by the equation above. A 2.0 mol sample of CaCO3 (s) is placed in a rigid 100.L reaction vessel from which all the air has been evacuated. The vessel is heated to 898°C at which time the pressure of CO2 (g) in the vessel is constant at 1.50 atm, while some CaCO3 (s) remains in the vessel. (a) Calculate the number of moles of CO2 (g) present in the vessel at equilibrium. (b) Write the expression for Kp, the equilibrium constant for the reaction, and determine its value at 898°C.
CaCO3 (s) 2 CaO (s) + CO2 (g) When heated strongly, solid calcium carbonate decomposes to produce solid calcium oxide and carbon dioxide gas, as represented by the equation above. A 2.0 mol sample of CaCO3 (s) is placed in a rigid 100.L reaction vessel from which all the air has been evacuated. The vessel is heated to 898°C at which time the pressure of CO2 (g) in the vessel is constant at 1.50 atm, while some CaCO3 (s) remains in the vessel. (a) Calculate the number of moles of CO2 (g) present in the vessel at equilibrium. (b) Write the expression for Kp, the equilibrium constant for the reaction, and determine its value at 898°C.
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Chapter1: Chemical Foundations
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Transcribed Image Text:CaCO3 (s) 2 CaO (s) + CO2 (g)
When heated strongly, solid calcium carbonate decomposes to produce solid calcium oxide and carbon dioxide gas, as represented by the equation
above. A 2.0 mol sample of CaCO3 (s) is placed in a rigid 100.L reaction vessel from which all the air has been evacuated. The vessel is heated to 898°C
at which time the pressure of CO2 (g) in the vessel is constant at 1.50 atm, while some CaCO3 (s) remains in the vessel.
(a) Calculate the number of moles of CO2 (g) present in the vessel at equilibrium.
(b) Write the expression for Kp, the equilibrium constant for the reaction, and determine its value at 898°C.
(c) The experiment was repeated, but this time starting with a 4.0 mol sample of CaCO3 (s). On the following graph, draw a curve showing how the
pressure of CO2 (g) would change over time as the vessel is heated to 898°C and equilibrium is established.
2.00
1.00
0.00-
Time
Pressure of CO, (atm)
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