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For the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what will happen if the volume of th

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Question: For the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what will happen if the volume of the container is increased? (2020) 2020

Options:

  1. Equilibrium shifts to the right
  2. Equilibrium shifts to the left
  3. No change in equilibrium
  4. Reaction stops

Correct Answer: Equilibrium shifts to the left

Exam Year: 2020

Solution: 

Increasing the volume decreases the pressure, and according to Le Chatelier\'s principle, the equilibrium will shift to the side with more moles of gas, which is the left side in this case.

For the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what will happen if the volume of th

Practice Questions

Q1
For the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what will happen if the volume of the container is increased? (2020) 2020
  1. Equilibrium shifts to the right
  2. Equilibrium shifts to the left
  3. No change in equilibrium
  4. Reaction stops

Questions & Step-by-Step Solutions

For the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what will happen if the volume of the container is increased? (2020) 2020
  • Step 1: Understand the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g). This means that 2 moles of sulfur dioxide (SO2) and 1 mole of oxygen (O2) can produce 2 moles of sulfur trioxide (SO3).
  • Step 2: Count the total moles of gas on each side of the reaction. On the left side (reactants), there are 2 moles of SO2 and 1 mole of O2, which totals 3 moles. On the right side (products), there are 2 moles of SO3.
  • Step 3: Note that increasing the volume of the container decreases the pressure inside the container.
  • Step 4: Apply Le Chatelier's principle, which states that if a system at equilibrium is disturbed, it will shift to counteract the disturbance.
  • Step 5: Since increasing the volume decreases the pressure, the equilibrium will shift to the side with more moles of gas to increase the pressure again.
  • Step 6: Identify which side has more moles of gas. The left side has 3 moles (2SO2 + 1O2) and the right side has 2 moles (2SO3).
  • Step 7: Conclude that the equilibrium will shift to the left side (reactants) because it has more moles of gas.
  • Le Chatelier's Principle – This principle states that if a system at equilibrium is subjected to a change in concentration, temperature, or pressure, the system will adjust to counteract that change and restore a new equilibrium.
  • Gas Laws – Understanding how changes in volume affect pressure and the behavior of gases in a chemical reaction.
  • Equilibrium Shifts – Recognizing how changes in conditions (like volume) can shift the position of equilibrium towards the side with more or fewer moles of gas.
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