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For the reaction: A(g) + B(g) ⇌ C(g) + D(g), if the volume of the container is d

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Question: For the reaction: A(g) + B(g) ⇌ C(g) + D(g), if the volume of the container is decreased, what will be the effect on the equilibrium? (2023)

Options:

  1. Shift to the left
  2. Shift to the right
  3. No effect
  4. Increase the concentration of A

Correct Answer: Shift to the left

Exam Year: 2023

Solution: 

Decreasing the volume increases the pressure. According to Le Chatelier\'s principle, the equilibrium will shift towards the side with fewer moles of gas. If there are more moles of gas on the left side, the equilibrium will shift to the left.

For the reaction: A(g) + B(g) ⇌ C(g) + D(g), if the volume of the container is d

Practice Questions

Q1
For the reaction: A(g) + B(g) ⇌ C(g) + D(g), if the volume of the container is decreased, what will be the effect on the equilibrium? (2023)
  1. Shift to the left
  2. Shift to the right
  3. No effect
  4. Increase the concentration of A

Questions & Step-by-Step Solutions

For the reaction: A(g) + B(g) ⇌ C(g) + D(g), if the volume of the container is decreased, what will be the effect on the equilibrium? (2023)
  • Step 1: Identify the reaction: A(g) + B(g) ⇌ C(g) + D(g).
  • Step 2: Understand that A, B, C, and D are gases.
  • Step 3: Recognize that decreasing the volume of the container increases the pressure inside.
  • Step 4: Recall Le Chatelier's principle, which states that if a system at equilibrium is disturbed, it will shift to counteract the disturbance.
  • Step 5: Determine the number of moles of gas on each side of the reaction: left side (A + B) has 2 moles, right side (C + D) has 2 moles.
  • Step 6: Since both sides have the same number of moles of gas, the equilibrium will not shift in either direction.
  • Le Chatelier's Principle – This principle states that if an external change is applied to a system at equilibrium, the system will adjust to counteract that change and restore a new equilibrium.
  • Effect of Volume on Gas Equilibrium – Decreasing the volume of a gas reaction increases pressure, which can shift the equilibrium position depending on the number of moles of gas on each side of the reaction.
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