Full Answer Section

Pressure: Changing the pressure primarily affects reactions involving gases. Increasing pressure will favor the side with fewer moles of gas, while decreasing pressure will favor the side with more moles of gas.  

3. Temperature: Changing the temperature affects the equilibrium constant and shifts the equilibrium in the direction that absorbs or releases heat. For an endothermic reaction (absorbs heat), increasing temperature favors the forward reaction. For an exothermic reaction (releases heat), increasing temperature favors the reverse reaction.  

4. Catalyst: A catalyst speeds up both the forward and reverse reactions equally, thus reaching equilibrium faster but does not affect the position of equilibrium or the concentrations of reactants and products at equilibrium.  

Le Chatelier’s Principle summarizes these effects: “If a change of condition is applied to a system in equilibrium, the system will shift in a direction that relieves the stress.”  

Understanding chemical equilibrium is crucial in various fields, including:

• Chemistry: Predicting reaction outcomes and optimizing reaction conditions.  
• Biology: Understanding biochemical processes and metabolic pathways.
• Environmental science: Studying chemical reactions in the atmosphere and water bodies.
• Industrial processes: Designing and controlling chemical reactions for efficient production.

By manipulating these factors, we can control the direction and extent of chemical reactions, which has significant implications for various applications in science and technology.