Equilibrium and Reaction Dynamics

The video tutorial explains how reversible reactions achieve equilibrium and how Le Chatelier's Principle describes the system's response to stress. It covers the effects of changing concentration, pressure, volume, and temperature on equilibrium, detailing how these factors influence the rates of forward and reverse reactions. The tutorial also distinguishes between exothermic and endothermic reactions, explaining how temperature changes can shift equilibrium.

What happens to a reversible reaction when equilibrium is disturbed?

• The reaction becomes irreversible.

• The forward and reverse reaction rates adjust to restore equilibrium.

• The reaction stops completely.

• The reaction rate remains constant.

According to Le Chatelier's Principle, how does a system at equilibrium respond to stress?

• It remains unchanged.

• It shifts in the direction that increases the stress.

• It shifts in the direction that relieves the stress.

• It becomes unstable.

Which of the following is NOT a type of stress that can be applied to a system at equilibrium?

• Changing the pressure or volume of a gas

• Changing the concentration of reactants or products

• Changing the temperature

• Changing the color of the reactants

What occurs when additional reactants are added to a system at equilibrium?

• The system remains unchanged.

• The forward reaction rate decreases.

• The reverse reaction rate increases.

• The forward reaction rate increases.

How does a system at equilibrium respond when reactants are removed?

• The reverse reaction rate increases.

• The forward reaction rate increases.

• The system remains unchanged.

• The reaction stops.

What happens to the pressure in a gaseous reaction when the volume of the container is decreased?

• The pressure decreases.

• The reaction stops.

• The pressure remains constant.

• The pressure increases.

In a gaseous equilibrium, how does the system respond to an increase in pressure?

• It shifts towards the side with more moles of gas.

• It shifts towards the side with fewer moles of gas.

• It shifts towards the side with equal moles of gas.

• It remains unchanged.

What characterizes an exothermic reaction in terms of heat?

• Heat is neither absorbed nor released.

• Heat remains constant.

• Heat is released from the system.

• Heat is absorbed by the system.

How is heat treated in an endothermic reaction?

• As a catalyst

• As a product

• As a reactant

• As an inhibitor

What is the effect of increasing temperature on an endothermic reaction at equilibrium?

• The system remains unchanged.

• The reverse reaction rate increases.

• The forward reaction rate decreases.

• The forward reaction rate increases.