Reversible Reactions - Experiment

The video tutorial explains the evaporation of water in a closed container, using a manometer to measure pressure changes. Initially, the pressure increases as water evaporates, but eventually stabilizes, indicating equilibrium. At this dynamic equilibrium, evaporation and condensation occur simultaneously, with no net change in water levels. The concept of reversible reactions is introduced, where the rate of evaporation equals the rate of condensation, maintaining constant concentrations of reactants and products.

What happens to the pressure inside the container as water begins to evaporate?

• The pressure remains constant.

• The pressure fluctuates randomly.

• The pressure decreases.

• The pressure increases.

What is indicated by the constant pressure in the manometer after some time?

• The water has completely evaporated.

• The system has reached equilibrium.

• The container is leaking.

• The water is boiling.

In a state of dynamic equilibrium, what happens to the rates of evaporation and condensation?

• Both rates increase continuously.

• Evaporation stops completely.

• Condensation stops completely.

• Both rates become equal.

What characterizes a reversible reaction at equilibrium?

• There is no reaction occurring.

• The rates of both reactions are equal.

• The backward reaction rate is higher than the forward reaction rate.

• The forward reaction rate is higher than the backward reaction rate.

At equilibrium, what happens to the concentration of reactants and products?

• The concentration of both decreases.

• The concentration of both remains unchanged.

• The concentration of products increases.

• The concentration of reactants increases.