Le Chatelier's Principle

The video explains Le Chatelier's principle, which describes how a system at equilibrium responds to stress. It covers how changes in concentration, temperature, and volume or pressure can shift the equilibrium to relieve stress. Examples include adding reactants or products, altering temperature for exothermic or endothermic reactions, and changing volume or pressure in gaseous systems.

What happens to the equilibrium when more reactants are added to a system?

• The equilibrium shifts randomly.

• The equilibrium remains unchanged.

• The equilibrium shifts to the right.

• The equilibrium shifts to the left.

How does an exothermic reaction respond to an increase in temperature?

• The equilibrium shifts randomly.

• The equilibrium remains unchanged.

• The equilibrium shifts to the right.

• The equilibrium shifts to the left.

In an endothermic reaction, what role does heat play?

• Heat is a product.

• Heat is both a product and a reactant.

• Heat is a reactant.

• Heat is neither a product nor a reactant.

What effect does decreasing the volume have on a gaseous equilibrium system?

• The equilibrium shifts towards the side with more particles.

• The equilibrium shifts towards the side with fewer particles.

• The equilibrium remains unchanged.

• The equilibrium shifts randomly.

If the pressure is lowered in a gaseous equilibrium, which direction will the equilibrium shift?

• The equilibrium remains unchanged.

• Towards the side with more particles.

• Towards the side with fewer particles.

• The equilibrium shifts randomly.