Chemical Equilibrium Concepts and Examples

The video tutorial introduces chemical equilibrium, focusing on homogeneous and heterogeneous types. Homogeneous equilibrium occurs when reactants and products are in a single phase, while heterogeneous equilibrium involves multiple phases. Examples illustrate each type, emphasizing the conditions under which equilibrium is achieved. The video concludes with a summary of key points.

What are the two main types of chemical equilibrium?

• Static and Dynamic

• Homogeneous and Heterogeneous

• Reversible and Irreversible

• Endothermic and Exothermic

What condition must be met for a mixture to be in homogeneous equilibrium?

• The rate of forward and reverse reactions must be equal

• The reactants must be in different phases

• The temperature must be constant

• The pressure must be constant

In a homogeneous equilibrium, what is true about the phases of reactants and products?

• They exist in a single phase

• They are always in gaseous phase

• They exist in multiple phases

• They are always in liquid phase

Which of the following is an example of a homogeneous equilibrium?

• Salt dissolving in water

• Water freezing into ice

• Nitrogen and oxygen reacting to form nitrogen dioxide

• Calcium carbonate decomposing into calcium oxide and carbon dioxide

In a heterogeneous equilibrium, how do the phases of reactants and products differ?

• They are always in solid phase

• They exist in two or more different phases

• They are always in the same phase

• They are always in liquid phase

Which reaction is an example of heterogeneous equilibrium?

• Hydrogen and chlorine forming hydrochloric acid

• Nitrogen and hydrogen forming ammonia

• Calcium carbonate decomposing into calcium oxide and carbon dioxide

• Oxygen dissolving in water

What is a key characteristic of a heterogeneous equilibrium?

• All reactants and products are in the same phase

• Reactants and products are in different phases

• The reaction is irreversible

• The reaction is exothermic

How does the concentration of reactants and products behave in a chemical equilibrium?

• It keeps changing

• It remains constant

• It decreases over time

• It increases over time

What distinguishes homogeneous equilibrium from heterogeneous equilibrium?

• The temperature at which they occur

• The speed of the reaction

• The pressure at which they occur

• The phases of reactants and products

Which of the following statements is true about chemical equilibrium?

• It only occurs in liquid reactions

• It only occurs in gaseous reactions

• It can occur in both open and closed systems

• It can only occur in closed systems