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For the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g), what is the effect of increasing te

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Question: For the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g), what is the effect of increasing temperature on the equilibrium if the reaction is exothermic? (2020)

Options:

  1. Equilibrium shifts to the right
  2. Equilibrium shifts to the left
  3. No effect on equilibrium
  4. Equilibrium constant increases

Correct Answer: Equilibrium shifts to the left

Exam Year: 2020

Solution: 

For an exothermic reaction, increasing the temperature shifts the equilibrium to the left, favoring the reactants.

For the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g), what is the effect of increasing te

Practice Questions

Q1
For the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g), what is the effect of increasing temperature on the equilibrium if the reaction is exothermic? (2020)
  1. Equilibrium shifts to the right
  2. Equilibrium shifts to the left
  3. No effect on equilibrium
  4. Equilibrium constant increases

Questions & Step-by-Step Solutions

For the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g), what is the effect of increasing temperature on the equilibrium if the reaction is exothermic? (2020)
  • Step 1: Identify the type of reaction. The reaction given is exothermic, meaning it releases heat.
  • Step 2: Understand what happens when temperature increases. Increasing temperature adds heat to the system.
  • Step 3: Apply Le Chatelier's Principle. This principle states that if a system at equilibrium is disturbed, it will shift to counteract the disturbance.
  • Step 4: Determine the direction of the shift. Since the reaction is exothermic, adding heat will shift the equilibrium to the left, favoring the reactants (SO2 and O2).
  • Step 5: Conclude the effect of increasing temperature. The equilibrium shifts to the left, resulting in more reactants and less product (SO3).
  • Le Chatelier's Principle – This principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change.
  • Exothermic Reactions – In exothermic reactions, heat is released, and increasing temperature can shift the equilibrium towards the reactants.
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