evaporation causes cooling. comment on this statement
Answers
ANSWER :
Evaporation causes cooling because the process requires heat energy. The energy is taken away by the molecules when they convert from liquid into gas, and this causes cooling on the original surface.
Answer:
Evaporation is the change of liquid into vapor without reaching at its boiling point .
Evaporation is a surface phenomenon .
The rate of Evaporation depends on the following :-
=> Increase in Surface area
When surface area is more , the rate of evaporation is more.
Also , when the surface area is less , the rate of evaporation is also less.
For example , we spread out clothes [ increase in surface area ] to get it dried fast
=> Increase in Temperature
When the temperature is more , the rate of evaporation is also more.
=> Decrease in humidity
Humidity is the amount of water present in air.
If it is less ,the rate of evaporation decreases/
=> Increase in wind speed
With the increase in wind speed , more particles of water vapor move away with wind , hence increasing rate of evaporation
We also know that evaporation causes cooling.
Here are the examples :
<> When we apply deodorant on our hand , it feels cool
<> While applying acetone on our nails to remove nail polish , it feels cool.
<> Also , we prefer to drink tea from a saucer than in a cup.
The rate of evaporation in a saucer is more [ as in a saucer surface area is more ]
Hence , evaporation takes place fast and cools the tea fast in a saucer
Hence , we can drink tea easily in a saucer.
<> We wear cotton clothes in summer to keep ourselves cool .
<> Vaporization of water from the leaves of a tree , cools the surroundings .
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Explanation: