Question

Define sublimation? Explain it with an activity and few examples.

Answer 1

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✨Sublimation :

➡️Sublimation is the process in which solids get directly converted to gases without changing to liquid or vice versa.

⭕How Sublimation Works

➡️Substances such as water and carbon dioxide (CO2) can be charted on a pressure versus temperature plot to reveal their state of matter (solid, liquid, or gas) at a given temperature and pressure. At a typical atmospheric pressure, we know that water is a solid at temperatures below 0 degrees Celsius, a liquid from 0 to 100 degrees Celsius, and a gas at higher temperatures. Atmospheric pressure, however, can change, particularly with altitude. Higher altitudes yield lower atmospheric pressures

⭕EXAMPLE :Dry Ice

➡️As mentioned earlier, dry ice is one of the most popular examples of sublimation in real life. As the solid form of carbon dioxide, dry ice creates a smoky effect that is commonly used in ice cream parlors today. Because the substance is relatively safe to handle, it is often used for classroom demonstrations.

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Answer 2

SUBLIMATION

• Change of solid state directly to gaseous state without going through liquid state is called sublimation.
• Examples :- Moth Ballsz, Freeze Drying, Air Fresheners, Dry Ice, Naphthalene balls etc.

Uses of Sublimation

• It is used by the chemist to purify compounds.
• The air freshener are used in washrooms. The air freshener sublimes and releases smell.
• Dry ice is used in cooling at a room temperature.