In the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what happens to the equilibrium positi

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Question: In the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what happens to the equilibrium position if the pressure is increased? (2023)

Options:

Correct Answer: Shifts to the right

Exam Year: 2023

Solution:

Increasing the pressure shifts the equilibrium towards the side with fewer moles of gas, which in this case is the right side (2 moles of NH3).

In the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what happens to the equilibrium position if the pressure is increased? (2023)

In the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what happens to the equilibrium position if the pressure is increased? (2023)

Step 1: Identify the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g).
Step 2: Count the number of gas moles on each side of the reaction.
Step 3: On the left side, there are 1 mole of N2 and 3 moles of H2, totaling 4 moles of gas.
Step 4: On the right side, there are 2 moles of NH3.
Step 5: Compare the total moles of gas: 4 moles on the left vs. 2 moles on the right.
Step 6: Understand that increasing pressure favors the side with fewer moles of gas.
Step 7: Since the right side has fewer moles (2 moles of NH3), the equilibrium will shift to the right.

Le Chatelier's Principle – This principle states that if an external change is applied to a system at equilibrium, the system will adjust to counteract that change and restore a new equilibrium.
Mole Count in Gaseous Reactions – Understanding how the number of moles of gas on each side of a reaction affects the equilibrium position when pressure changes.