Factors affecting evaporation


 
 
Concept Explanation
 

Factors affecting evaporation

Factors affecting evaporation: Nature of liquid: lower the boiling point of a liquid, higher is its rate of evaporation. For example, boiling point of water id 100°C and that of ether is 34°C. Hence, ether evaporates much faster than water.

  • Temperature of liquid: higher the temperature of a liquid, higher is its rate of evaporation. This is because the speed of particles is increased at a higher temperature.
  • Surface area of the liquid: larger the surface area, higher is its rate of evaporation. A large surface area provides more energy for particles to go out for evaporation. That is why unfolded clothes dries faster than a folded one.
  • Wind velocity: in an airy place the rate of evaporation of liquid is faster. The wind carries away the particles of vapour more rapidly.
  • Humidity: the amount of water vapour present in air is called humidity. In humid air very little evaporation takes place, while in dry air rapid evaporation occurs. So, wet clothes take longer time to dry in humid air, but they dry faster in dry air.
  • Sample Questions
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    Question : 1

    Evaporation increases with the _________________ of surface area.

    Right Option : D
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    Question : 2

    The evaporation of a liquid can best be carried out in a _____________________

    Right Option : B
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    Question : 3

    Which one will help to accelerate the process of evaporation of a liquid kept in an open china dish?

    Right Option : D
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