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In the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what happens to the equilibrium if th

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Question: In the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what happens to the equilibrium if the volume of the container is decreased?

Options:

  1. Shift to the right
  2. Shift to the left
  3. No change
  4. Increase the rate of reaction

Correct Answer: Shift to the right

Solution: 

Decreasing the volume increases the pressure, and the equilibrium will shift towards the side with fewer moles of gas, which is the right side (2 moles of SO3).

In the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what happens to the equilibrium if th

Practice Questions

Q1
In the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what happens to the equilibrium if the volume of the container is decreased?
  1. Shift to the right
  2. Shift to the left
  3. No change
  4. Increase the rate of reaction

Questions & Step-by-Step Solutions

In the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what happens to the equilibrium if the volume of the container is decreased?
  • Step 1: Understand that the reaction involves gases: 2SO2, O2, and 2SO3.
  • Step 2: Identify the total number of gas moles on each side of the reaction.
  • Step 3: Count the moles on the left side: 2 moles of SO2 + 1 mole of O2 = 3 moles total.
  • Step 4: Count the moles on the right side: 2 moles of SO3 = 2 moles total.
  • Step 5: Recognize that decreasing the volume of the container increases the pressure of the gases inside.
  • Step 6: Apply Le Chatelier's principle, which states that if a system at equilibrium is disturbed, it will shift to counteract the disturbance.
  • Step 7: Since there are fewer moles of gas on the right side (2 moles of SO3) compared to the left side (3 moles), the equilibrium will shift to the right.
  • Step 8: Conclude that the equilibrium will shift towards the production of SO3 when the volume is decreased.
  • Le Chatelier's Principle – This principle states that if a system at equilibrium is subjected to a change in conditions (such as pressure, temperature, or concentration), 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.
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