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

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

Options:

  1. Shifts to the right
  2. Shifts to the left
  3. No effect
  4. Increases the reaction rate

Correct Answer: Shifts to the left

Solution: 

Increasing the volume decreases the pressure, which shifts the equilibrium to the left, favoring the side with more moles of gas (3 moles of reactants).

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

Practice Questions

Q1
For the equilibrium reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what will happen if the volume of the container is increased?
  1. Shifts to the right
  2. Shifts to the left
  3. No effect
  4. Increases the reaction rate

Questions & Step-by-Step Solutions

For the equilibrium reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what will happen if the volume of the container is increased?
  • Step 1: Understand the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g). This means we have 2 moles of SO2 and 1 mole of O2 on the left (reactants) and 2 moles of SO3 on the right (products).
  • Step 2: Count the total moles of gas on each side. On the left, we have 2 moles of SO2 + 1 mole of O2 = 3 moles of gas. On the right, we have 2 moles of SO3.
  • Step 3: Know that increasing the volume of the container decreases the pressure inside the container.
  • Step 4: According to Le Chatelier's principle, if the pressure decreases, the equilibrium will shift to the side with more moles of gas to counteract the change.
  • Step 5: Since the left side has 3 moles of gas and the right side has 2 moles, the equilibrium will shift to the left (towards the reactants).
  • 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 that change.
  • Gas Laws – Understanding how changes in volume affect pressure and the behavior of gases in equilibrium reactions.
  • Stoichiometry of Gases – Recognizing the number of moles of gas on each side of the equilibrium to determine the direction of the shift.
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