Equilibrium and Thermodynamics Concepts

The video tutorial explains how temperature changes affect chemical equilibrium, specifically the equilibrium constant K. It covers the differences between exothermic and endothermic reactions, emphasizing how heat is treated as a product or reactant. The teeter-totter model is introduced to visualize shifts in equilibrium due to temperature changes. Practical examples are provided to illustrate these concepts, and the video concludes with a brief mention of other factors like pressure and concentration.

What happens to the equilibrium constant K when the temperature of a system changes?

• It increases.

• It remains the same.

• It changes.

• It decreases.

Why is it important to maintain a constant temperature in equilibrium problems?

• To ensure the value of K remains constant.

• To decrease the rate of reaction.

• To increase the rate of reaction.

• To change the value of K.

In an exothermic reaction, where should the word 'heat' be written?

• It should not be written.

• In the middle of the equation.

• On the product side.

• On the reactant side.

What does a negative Delta H indicate in a reaction?

• The reaction is endothermic.

• The reaction releases energy.

• The reaction does not involve energy.

• The reaction absorbs energy.

In an endothermic reaction, where should the word 'heat' be written?

• On the product side.

• In the middle of the equation.

• It should not be written.

• On the reactant side.

What does a positive Delta H indicate in a reaction?

• The reaction is exothermic.

• The reaction releases energy.

• The reaction does not involve energy.

• The reaction absorbs energy.

If the temperature is increased in an exothermic reaction, which direction will the equilibrium shift?

• Toward the products.

• It will shift randomly.

• Toward the reactants.

• It will not shift.

If the temperature is decreased in an exothermic reaction, which direction will the equilibrium shift?

• Toward the reactants.

• It will shift randomly.

• Toward the products.

• It will not shift.

If the temperature is increased in an endothermic reaction, which direction will the equilibrium shift?

• It will shift randomly.

• Toward the products.

• It will not shift.

• Toward the reactants.

If the temperature is decreased in an endothermic reaction, which direction will the equilibrium shift?

• It will shift randomly.

• Toward the products.

• Toward the reactants.

• It will not shift.