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For the reaction: 2A(g) + B(g) ⇌ 3C(g), if the volume of the container is decrea

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Question: For the reaction: 2A(g) + B(g) ⇌ 3C(g), if the volume of the container is decreased, what will be the effect on the equilibrium? (2022)

Options:

  1. Shift to the left
  2. Shift to the right
  3. No change
  4. Increase in temperature

Correct Answer: Shift to the right

Exam Year: 2022

Solution: 

Decreasing the volume increases the pressure, and the equilibrium will shift towards the side with fewer moles of gas. Here, it shifts to the right, producing more C.

For the reaction: 2A(g) + B(g) ⇌ 3C(g), if the volume of the container is decrea

Practice Questions

Q1
For the reaction: 2A(g) + B(g) ⇌ 3C(g), if the volume of the container is decreased, what will be the effect on the equilibrium? (2022)
  1. Shift to the left
  2. Shift to the right
  3. No change
  4. Increase in temperature

Questions & Step-by-Step Solutions

For the reaction: 2A(g) + B(g) ⇌ 3C(g), if the volume of the container is decreased, what will be the effect on the equilibrium? (2022)
  • Step 1: Understand that the reaction involves gases: 2A(g) + B(g) ⇌ 3C(g).
  • Step 2: Identify the number of gas moles on each side of the reaction.
  • Step 3: Count the moles: On the left side (reactants), there are 2 moles of A and 1 mole of B, totaling 3 moles. On the right side (products), there are 3 moles of C.
  • Step 4: Recognize that decreasing the volume of the container increases the pressure of the gases inside.
  • Step 5: Apply Le Chatelier's principle, which states that if a system at equilibrium is disturbed, it will shift to counteract the disturbance.
  • Step 6: Since increasing pressure favors the side with fewer moles of gas, determine which side has fewer moles.
  • Step 7: Compare the moles: The left side has 3 moles and the right side has 3 moles, so they are equal.
  • Step 8: Since both sides have the same number of moles, the equilibrium will not shift significantly in either direction.
  • 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.
  • Mole Ratio in Gaseous Reactions – Understanding the relationship between the number of moles of gas on each side of the equilibrium equation is crucial for predicting the direction of the shift.
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