Question

What is the Equilibrium that exists between a liquid and its vapour?

Answer 1

Dynamic Equilibrium:

• A state of equilibrium where the state of equilibrium is changing, but the ratio of reactant to product is not changing.
• Though the ratio is not changing but there is transfer of reactant to the product could be seen.
• The equilibrium which exists between a liquid and its vapour is called the dynamic equilibrium.
• This exists when the vapour pressure remains constant.

Condition:

• To exist a dynamic equilibrium between a liquid and its vapour, the rate of evaporation of liquid should be equal to the rate of condensation of vapour.