Magnesium Carbonate Dissociates to Magnesium Oxide and Carbon Dioxide at Elevated

question 55

Multiple Choice

Magnesium carbonate dissociates to magnesium oxide and carbon dioxide at elevated temperatures.
MgCO₃(s)
MgO(s) + CO₂(g)
A reaction vessel contains these compounds in equilibrium at 300°C.What will happen if the volume of the container is reduced by 25% at 300°C?

• A)The partial pressure of carbon dioxide present at equilibrium will increase.
• B)The partial pressure of carbon dioxide present at equilibrium will decrease.
• C)The partial pressure of carbon dioxide at equilibrium will be unchanged.
• D)The equilibrium constant will have to decrease to compensate for the decrease in volume.
• E)More information is needed in order to make a valid judgment.