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प्रश्न
What is evaporation?
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उत्तर १
“The change of state of a liquid to vapour at all temperatures from the surface of the liquid is called evaporation.”
उत्तर २
Evaporation is the process by which water changes its state from liquid to water vapour (gaseous state) due to heat from the Sun or any other heat source. It mostly occurs from water bodies, wet or irrigated soil, wet clothes, etc. Although mainly a daytime phenomenon, evaporation is a continuous process with varying degrees.
Factors that increase the rate of evaporation include clear skies, wind (which replaces moist air with dry air that can hold more moisture), an increase in surface area (like spreading wet clothes), and higher air temperatures (which increase the air’s capacity to hold water vapour).
संबंधित प्रश्न
How does water kept in an earthen pot (matka) become cool during summer?
Why are we able to sip hot tea or milk faster from a saucer than a cup?
Give two applications of evaporation.
Define the following term Freezing.
If the back of your hand is moistened with alcohol, you will find that it rapidly becomes dry. Why is it that while it is drying, your hand feels cool ?
How will you demonstrate that water vapour is present in air ?
Why does evaporation cool a liquid ?
The ______ of air is dependent on the temperature of air.
How does the water kept in an earthen pot remain cool?
Look at Fig. 1.3 and suggest in which of the vessels A,B, C or D the rate of evaporation will be the highest? Explain.
