Question

10 examples for evaporation causes cooling

Answer 1

$\Bold{1.During hot summers,the water is usually kept in the earthern pot to keep it cool.Water is cooled in the pot since the surface of the pot contains large pores and water seeps via these pores to outside of pot. This water evaporates and takes the latent heat for vaporisation hence retaining the water inside pot to be cooled.}$

$\Bold{2.Especially in villages,people often sprinkle water on the ground in front of their homes during hot summers.}$

$\Bold{3.Water vaporisation from leaves of trees also cools the surroundings.}$

$\Bold{4.A desert cooler cools better on a hot and dry day.}$

$\Bold{5.It is a common observation that we are able to sip hot tea(or milk) faster from a saucer than from a cup.}$

$\Bold{6.Wearing cotton clothes in summer days to keep the body cool and comfortable.}$

$\Bold{7.Put a little of spirit on your hand and wave around, the spirit evaporates rapidly and our hands feels cooler.}$

$\Bold{8.We sweat to cool (evaporation).Refrigeration works on the same principal.}$

$\Bold{9.Dogs putting their tongues out and panting to keep cool(evaporation) Unglazed earthenware pottery will chill liquids because they allow the liquid to seep which then allows evaporation, causing cooling.}$

$\Bold{10.If you wet your fingers with alcohol, you can feel the chill as wind blows.}$

Answer 2

Concept: A type of vaporisation called evaporation takes place on the surface of a liquid as it transitions into the gas phase. The evaporating substance must not completely fill the surrounding gas. The liquid's molecules clash, and depending on how they hit each other, they exchange energy. A liquid transforms into a gas during evaporation. It is simple to picture when puddles of rain "vanish" on a hot day or when wet clothing dries in the sun. In these instances, the liquid water is evaporating into a gas known as water vapour rather than really dissipating.

Given: evaporation causes cooling

To find: 10 examples

Solution:  Examples for evaporation causes cooling are

1. When drying clothes outside in the sun, water is removed from the garments as the sun's heat causes water droplets to evaporate.

2. Drying up of puddles and potholes on streets: Rain and heat from the sun cause water to evaporate from puddles and potholes on the ground.

3. The evaporation of perspiration from the body - As sweat on our bodies evaporates, our bodies lose heat.

4. Tea and other hot drinks cool down a little bit due to heat loss caused by water evaporation.

5. Drying up of nearby water bodies, such as lakes and ponds: During the hot summer months, water evaporates and only replenishes itself after rain.

6. After being washed, wet hair dries naturally as heat from the sun or a hair dryer causes water to evaporate.

7. How common salt is made: Seawater is naturally evaporated to create salt.

8. When hot press evaporates water vapour contained in the fabric and eliminates wrinkles, clothes iron well.

9. Water in an earthen pot or matka cools as it evaporatively leaves the surface of the vessel.

10. Acetone in nail paint remover evaporates when applied to nails since it absorbs heat from our bodies.

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