Which of the following are true statements about equilibrium systems? 1.For the

Question

Which of the following are true statements about equilibrium systems?

1.For the following reaction at equilibrium: CaCO3(s) CaO(s) + CO2(g) adding more CaCO3 will shift the equilibrium to the left.

2.. 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.

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

4. For the following reaction at equilibrium: H2(g) + F2(g) 2HF(g) removing H2 will increase the amount of F2 present once equilibrium is reestablished.

5. 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.

Explanation / Answer

1)
CaCO3 is reactant and adding a reactant will shift the reaction to right
False

2)
increasing pressure will shift the reaction to side containing lesser gaseous molecule
so reaction will move to left
False

3)
increasing temperature will gavour endothermic part
since backward reaction is endothermic here, reaction will move to left
True

4)
removing H2 will favour backward reaction and will hence increase the amount of F2
True

5)
increasing volume will shift reaction to more gaseous molecule
hence reaction will shift to left
True

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