For the equilibrium 2A(g) ⇌ B(g) + C(g), if the volume of the container is doubl

Practice Questions

Q1
For the equilibrium 2A(g) ⇌ B(g) + C(g), if the volume of the container is doubled, what will happen to the equilibrium concentrations?
  1. Concentrations of A will increase
  2. Concentrations of B and C will increase
  3. Equilibrium will not change
  4. Concentrations of A will decrease

Questions & Step-by-Step Solutions

For the equilibrium 2A(g) ⇌ B(g) + C(g), if the volume of the container is doubled, what will happen to the equilibrium concentrations?
  • Step 1: Identify the equilibrium reaction: 2A(g) ⇌ B(g) + C(g).
  • Step 2: Count the number of moles of gas on each side of the equilibrium.
  • Step 3: On the left side (reactants), there are 2 moles of A.
  • Step 4: On the right side (products), there are 1 mole of B and 1 mole of C, totaling 2 moles.
  • Step 5: Note that both sides have the same number of moles (2 moles).
  • Step 6: Understand that when the volume of the container is doubled, the pressure decreases.
  • Step 7: According to Le Chatelier's principle, the equilibrium will shift to counteract the change in pressure.
  • Step 8: Since both sides have the same number of moles, the equilibrium position will not shift towards either side.
  • Step 9: Therefore, the concentrations of A, B, and C will all decrease due to the increased volume.
  • Le Chatelier's Principle – This principle states that if a system at equilibrium is subjected to a change in conditions (such as pressure or volume), the equilibrium will shift in a direction that counteracts the change.
  • Gas Laws – Understanding how changes in volume affect pressure and concentration in gaseous systems.
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