Understanding Vapour: Definition, Differences with Gas, and Process of Vaporization

Vapour is a substance that exists in a gaseous state at a temperature below its boiling point. It is formed when a liquid transforms into a gas. For example, water vapour is formed when water is heated and turns into steam.

Q2. What is the difference between vapour and gas ?
Ans. Vapour and gas are often used interchangeably, but there is a subtle difference between them. A gas is a substance that exists in a gaseous state at all temperatures, whereas a vapour is a substance that exists in a gaseous state only above its boiling point. In other words, a gas does not have a distinct boiling point, while a vapour does.

Q3. What is the process of vaporization ?
Ans. Vaporization is the process by which a liquid transforms into a gas. It occurs when the liquid is heated and the molecules on the surface of the liquid gain enough energy to break free from the surface tension and turn into gas. The temperature at which this process occurs is called the boiling point.

Q4. What are some common examples of vapour ?
Ans. Some common examples of vapour include water vapour, air, and steam. These substances exist in a gaseous state above their boiling points and can be seen in various forms, such as mist, fog, and clouds.