Evaporation
- Occurs at any temperature.
- Takes place only at the surface of a liquid.
- It is a slow process.
- No external heat supply is required.
- It is a cooling process.
- No bubbles are formed.
Boiling
- Occurs at a fixed temperature (the boiling point).
- Happens throughout the liquid, not just at the surface.
- It is a faster process, depending on the heat supplied.
- Requires a continuous heat supply.
- Does not produce any cooling effect.
- Formation of bubbles is observed.
Factors Affecting Boiling
- Impurities in the liquid can change the boiling point.
Factors Affecting Evaporation
- Surface area: A larger surface area increases evaporation.
- Humidity: Higher humidity slows down evaporation.
- Temperature: Higher temperatures increase evaporation.
- Wind speed: Wind helps evaporation (drying of clothes).
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