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For the exothermic reaction: N2(g) + 3H2(g) ⇌ 2NH3(g), what will happen if the t

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Question: For the exothermic reaction: N2(g) + 3H2(g) ⇌ 2NH3(g), what will happen if the temperature is increased? (2023)

Options:

  1. The equilibrium will shift to the right
  2. The equilibrium will shift to the left
  3. No change in equilibrium
  4. The reaction will stop

Correct Answer: The equilibrium will shift to the left

Exam Year: 2023

Solution: 

According to Le Chatelier\'s principle, increasing the temperature of an exothermic reaction shifts the equilibrium to the left, favoring the reactants.

For the exothermic reaction: N2(g) + 3H2(g) ⇌ 2NH3(g), what will happen if the t

Practice Questions

Q1
For the exothermic reaction: N2(g) + 3H2(g) ⇌ 2NH3(g), what will happen if the temperature is increased? (2023)
  1. The equilibrium will shift to the right
  2. The equilibrium will shift to the left
  3. No change in equilibrium
  4. The reaction will stop

Questions & Step-by-Step Solutions

For the exothermic reaction: N2(g) + 3H2(g) ⇌ 2NH3(g), what will happen if the temperature is increased? (2023)
  • Step 1: Understand that the reaction N2(g) + 3H2(g) ⇌ 2NH3(g) is exothermic, meaning it releases heat.
  • Step 2: Recall Le Chatelier's principle, which states that if a system at equilibrium is disturbed, it will shift to counteract the disturbance.
  • Step 3: Identify the disturbance in this case, which is an increase in temperature.
  • Step 4: Recognize that increasing the temperature adds heat to the system.
  • Step 5: Since the reaction is exothermic, the system will try to reduce the added heat by shifting the equilibrium to the left, towards the reactants (N2 and H2).
  • Step 6: Conclude that increasing the temperature will favor the formation of reactants over products.
  • 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 – Exothermic reactions release heat, and increasing temperature affects the equilibrium position.
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