What does equilibrium mean in the concept of vapour pressure?
Answer and explanation
Correct answer: Rates of evaporation and condensation becoming equal
Liquid-vapour equilibrium is dynamic, not static. Molecules continue to evaporate from the liquid and condense from the vapour, but at equilibrium the two rates are equal. As a result, the macroscopic amounts and pressure remain constant. The liquid does not need to disappear, and evaporation does not stop completely.
Frequently asked questions
What is the correct answer to this question?
Rates of evaporation and condensation becoming equal
Why is this the correct answer?
Liquid-vapour equilibrium is dynamic, not static. Molecules continue to evaporate from the liquid and condense from the vapour, but at equilibrium the two rates are equal. As a result, the macroscopic amounts and pressure remain constant. The liquid does not need to disappear, and evaporation does not stop completely.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Equilibrium. Topic: Equilibrium in physical and chemical processes.
