Le Chatelier's Principle and Equilibrium

The video tutorial explains Le Chatelier's Principle, focusing on how equilibrium systems respond to changes in concentration, pressure, and temperature. It highlights the principle's application in predicting the direction of equilibrium shifts. The tutorial also clarifies that only temperature changes affect the equilibrium constant (KC), debunking common misconceptions about the influence of concentration and pressure. The video uses examples to illustrate these concepts, emphasizing the importance of understanding these principles for answering related questions effectively.

What is the primary purpose of Le Chatelier's Principle in equilibrium systems?

• To calculate the exact concentration of reactants

• To understand how systems respond to stress

• To determine the speed of reactions

• To predict the color change in reactions

How does increasing the concentration of a reactant affect the equilibrium position?

• It has no effect on the equilibrium

• It shifts the equilibrium to the right

• It stops the reaction completely

• It shifts the equilibrium to the left

How does removing a reactant affect the equilibrium position?

• It shifts the equilibrium to the left

• It shifts the equilibrium to the right

• It has no effect on the equilibrium

• It increases the reaction rate

What happens to the equilibrium when the pressure is increased in a system with gases?

• The equilibrium shifts to the side with more gas particles

• The reaction stops

• The equilibrium shifts to the side with fewer gas particles

• The equilibrium remains unchanged

What is the result of increasing pressure in a reaction with equal moles of gas on both sides?

• The equilibrium shifts to the left

• The reaction stops

• The equilibrium shifts to the right

• The equilibrium remains unchanged

If a system at equilibrium is heated, which side of the reaction is favored?

• The side that releases heat (exothermic)

• The side with more products

• The side that absorbs heat (endothermic)

• The side with more reactants

In a reaction where the forward reaction is exothermic, what happens when the temperature is increased?

• The equilibrium remains unchanged

• The reaction stops

• The equilibrium shifts to the left

• The equilibrium shifts to the right

Which factor is the only one that changes the equilibrium constant (KC)?

• Temperature

• Catalyst

• Pressure

• Concentration

What is the effect on KC if the temperature decreases?

• KC becomes zero

• KC remains the same

• KC decreases

• KC increases

What is the effect of adding a catalyst to a system at equilibrium?

• It changes the equilibrium constant

• It shifts the equilibrium to the right

• It shifts the equilibrium to the left

• It speeds up the attainment of equilibrium