Sublimation and Deposition

Sublimation is the process by which a solid substance changes directly into a gas without going through the liquid state. On the other hand, deposition is the reverse process where a gas changes directly into a solid without going through the liquid state.

Examples of Sublimation

- Dry ice (solid carbon dioxide) sublimes at room temperature without melting into a liquid state.
- Camphor sublimes when it is kept in open air.
- Naphthalene balls used for moth protection also sublime over time.

Examples of Deposition

- When water vapor in the atmosphere condenses into solid ice crystals or frost on a cold surface.
- The formation of snowflakes when water vapor in the atmosphere freezes directly into solid ice crystals.

Fun Video: Changes of States of Matter

The video explains the concept of changes of states of matter in an entertaining and engaging way. It covers the three states of matter (solid, liquid and gas) and their interconversions through processes such as melting, freezing, evaporation, condensation, sublimation, and deposition. The video is visually appealing, and it uses simple language to explain complex concepts, making it an excellent resource for students to learn and revise the topic.

Conclusion

Sublimation and deposition are the processes by which a solid changes directly into a gas and a gas changes directly into a solid, respectively. These processes occur naturally in the environment and are used in various applications such as freeze-drying of food and preservation of biological samples. The video on changes of states of matter is a fun way to learn about the topic and is recommended for students seeking a better understanding of the topic.

Sublimation : It is a process that changes Solid to gas. Deposition : It is the process that changes gas to solid.