Equilibrium in Chemical Reactions

The video tutorial explains chemical equilibrium, where reactions occur at equal rates in both directions. It discusses how disturbances like changes in concentration, volume, or temperature affect equilibrium, leading to shifts in reaction direction to reestablish balance. Le Chatelier's Principle is introduced, describing how systems adjust to relieve disturbances. Examples include changes in gas volume affecting pressure and energy changes in endothermic and exothermic reactions.

What is the state called when the rate of the forward reaction equals the rate of the reverse reaction?

• Dynamic equilibrium

• Static equilibrium

• Chemical imbalance

• Reaction stasis

What happens to the reaction direction when some products are removed from an equilibrium system?

• The reaction shifts to produce more reactants.

• The reaction rate decreases uniformly.

• The reaction shifts to produce more products.

• The reaction stops completely.

What happens to the equilibrium when the concentration of reactants is increased?

• The reaction remains unchanged.

• The reaction rate decreases.

• The reaction shifts to produce more reactants.

• The reaction shifts to produce more products.

If the volume of a container with gaseous reactants is decreased, what is the expected effect on the reaction?

• The reaction shifts towards the side with more gas molecules.

• The reaction rate decreases.

• The reaction shifts towards the side with fewer gas molecules.

• The reaction remains unchanged.

What is the effect of increasing pressure on a gaseous equilibrium system?

• The reaction shifts towards the side with fewer gas molecules.

• The reaction shifts towards the side with more gas molecules.

• The reaction rate decreases.

• The reaction remains unchanged.

In an endothermic reaction, what is the effect of adding more energy?

• The reaction shifts to produce more reactants.

• The reaction shifts to produce more products.

• The reaction remains unchanged.

• The reaction rate decreases.

How does decreasing the temperature affect an exothermic reaction at equilibrium?

• The reaction shifts to produce more products.

• The reaction shifts to produce more reactants.

• The reaction remains unchanged.

• The reaction rate increases.

What is the result of removing energy from an endothermic reaction at equilibrium?

• The reaction remains unchanged.

• The reaction shifts to produce more reactants.

• The reaction shifts to produce more products.

• The reaction rate increases.

What principle explains the system's response to disturbances in equilibrium?

• Avogadro's Law

• Boyle's Law

• Dalton's Law

• Le Chatelier's Principle

Which of the following is NOT a factor that can disturb chemical equilibrium?

• Change in temperature

• Change in concentration

• Change in volume

• Change in color