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Question
Write a short note.
Regelation
Answer in Brief
Solution
- The phenomenon in which the ice converts to liquid due to applied pressure and then re-converts to ice once the pressure is removed is called regelation.
- Due to applied pressure, the melting point of ice is lowered below 0 °C. As a result, ice gets converted into water at 0 °C.
- When the applied pressure is removed, the melting point is restored to 0 °C and water gets re-converted into ice.
- Preparation of ice balls uses phenomenon of regelation. The shredded ice is pressurised around the tip of the stick and then due to regelation gets re-freezed in the form of a single solid ice ball.
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