Explain Le Chatelier's principle and apply it to a scenario where the volume of a gaseous system at equilibrium is increased.

3.1. Le Chatelier's principle states that if a change in conditions (temperature, pressure, or concentration of reactants/products) is applied to a system at equilibrium, the system will shift in a direction that relieves the stress and re-establishes a new equilibrium.

3.2. At the 5th minute, both the forward and reverse reaction rates decrease instantaneously. This indicates a sudden decrease in the concentration of all gaseous species. This occurs when the volume of the container is increased, leading to a decrease in pressure.
The disturbance is a:

• Decrease in pressure (or Increase in volume)

3.3. At the 15th minute, both the forward and reverse reaction rates increase instantaneously