EQUILIBRIUM

Resolved Question
Equilibrium Question

CaCO3, CaO and CO2 are at equilibrium. The Following actions are taken:

1. More CO2(g) is added to the system
2. More CaCO3(s) is added to the system
3. Decreased the Volume of the system,
4. Increased the temperature of the system

One or more of there actions lead to a change in CO2(g) concentration after equilibrium is re-established.

Which statements are responsible?

by joeyeehu...


Contributing In:
Chemistry
Best Answer - Chosen by Voters

CaCO3(s) <=========> CaO(s) + CO2(g)

You should use the Le Chatelier's Principle to predict the outcome.

It states that when a system in equilibrium is disturbed, the system will shift its equilibrium position in the direction so as to partially couteract the changes made until a new equilibrium is reestablished.

1. when more CO2 is added, the equilibrium position will shift to the left

2. when more CaCO3(s) is added, it will not change the equilibrium position. The equilibrium
position does not depend on the amount of solid reactants or solid products as long as there is
some solid left in the system.

3. decrease the volume will cause the pressure to increase. Increase in pressure will cause the
equilibrium position to shift to the left as there is less number of moles of gas on the left hand
side of the equation (zero as oppose to one one the right hand side)

4. increase the temperature willl cause the equilibrium position to shift to the right because the
forward reaction is endothermic.So, the answer is 1, 3 and 4