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Which of the following changes will not affect the position of equilibrium in th

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Question: Which of the following changes will not affect the position of equilibrium in the reaction N2(g) + 3H2(g) ⇌ 2NH3(g)? (2021)

Options:

  1. Increasing the temperature
  2. Increasing the pressure
  3. Adding a catalyst
  4. Removing NH3

Correct Answer: Adding a catalyst

Exam Year: 2021

Solution: 

A catalyst speeds up the rate of both the forward and reverse reactions equally, thus it does not affect the position of equilibrium. Other changes like temperature, pressure, and concentration of reactants/products do affect the equilibrium.

Which of the following changes will not affect the position of equilibrium in th

Practice Questions

Q1
Which of the following changes will not affect the position of equilibrium in the reaction N2(g) + 3H2(g) ⇌ 2NH3(g)? (2021)
  1. Increasing the temperature
  2. Increasing the pressure
  3. Adding a catalyst
  4. Removing NH3

Questions & Step-by-Step Solutions

Which of the following changes will not affect the position of equilibrium in the reaction N2(g) + 3H2(g) ⇌ 2NH3(g)? (2021)
  • Step 1: Understand what equilibrium means. In a chemical reaction, equilibrium is when the rate of the forward reaction equals the rate of the reverse reaction.
  • Step 2: Identify the reaction given: N2(g) + 3H2(g) ⇌ 2NH3(g). This means nitrogen and hydrogen gases react to form ammonia.
  • Step 3: Know that changes in temperature, pressure, or concentration of reactants/products can shift the position of equilibrium.
  • Step 4: Learn what a catalyst does. A catalyst is a substance that speeds up a reaction without being consumed in the process.
  • Step 5: Realize that a catalyst affects both the forward and reverse reactions equally, so it does not change the position of equilibrium.
  • Step 6: Conclude that adding a catalyst is the change that will not affect the position of equilibrium in this reaction.
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