which of the following statements are true about equilibrium systems?

Question

 True False  For the following reaction at equilibrium:

                      CaCO₃(s) ⇌ CaO(s) + CO₂(g)

                      adding more CaCO₃ will shift the equilibrium to the left.

 True False  For the following reaction at equilibrium: 

                      CaCO₃(s)⇌ CaO(s) + CO₂(g)

                      increasing the total pressure by adding Ar(g) will shift the equilibrium to the right.

which of the following statements are true statements about equilibrium systems?

 True False  For the following reaction at equilibrium:

                      H₂(g) + F₂(g) ⇌ 2HF(g)

                      removing H₂ will have no effect on the amount of F₂ present once equilibrium is reestablished.

 True False  For the following reaction at equilibrium:

                      2 H₂(g) + O₂(g) ⇌ 2 H₂O(g)

                      the equilibrium will shift to the left if the volume is doubled. 

 True False  Increasing the temperature of an exothermic reaction shifts the equilibrium position to the left.

Answer 1

False. Adding CaCO₃ will shift the equilibrium to the right according to Le Chatelier

False. Increasing the pressure will shift the equilibrium to the left because there are more moles of gas on the right.

False. Removing H₂(g) will shift the equilibrium to the left and more F₂(g) will be formed

True. Doubling the volume will reduce the pressure by 1/2 and since we are dealing with gases, the equilibrium will shift to the side with more moles of gas, i.e. in this case it will shift to the left.