EVAPORATION
CONTENT
- Definition of Evaporation
- Factors Affecting the Rate of Evaporation
- Application of the Cooling Effect of Evaporation and Latent Heat in Refrigerators
- Boiling Point
- Effect of Temperature on S.V.P
- Determination of the Boiling Point of a Liquid
- Effect of Pressure and Dissolved Substances on Boiling and Freezing Point
- Humidity
- Relative Humidity
- Measurement of Relative Humidity (Hygrometer)
- Dew Point, Mist and Cloud
Definition of Evaporation
Evaporation is a change of state from the liquid to the gaseous state. It takes place at all temperatures and from the surface of the liquid. Volatile liquids such as Freon, ether, alcohol, vaporize easily. Evaporation causes cooling because latent heat is taken from the body to change the liquid to the gaseous state. Example the human utilizes the process of evaporation in cooling after exercise.
Factors Affecting the Rate of Evaporation
- Temperature: The rate of evaporation increases as temperature increase.
- Pressure: The rate of evaporation decreases with increase in pressure.
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