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Aishwarya .r .j , asked a question
Subject: Science , asked on 21/6/15

evaporation causes cooling explain why

Tanishq Gupta , added an answer, on 21/5/12
156 helpful votes in Science

 evaporation causes cooling as when a liquid evaporates it absorbs the latent heat of vapourisation from its surroundings to regain the energy lost during evaporation. This absorbtion of energy from the surroundings makes the surroundings cool.

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Nitin Sathish Kumar , added an answer, on 30/12/16
5 helpful votes in Science
In an open vessel,the particles at the surface of the liquid continuously evaporates.During this process it absorbs heat equal to latent heat of vaporisation(heat required for evaporation) from the surroundings.So the surroundings lose energy and becomes cool.Therefore , evaporation causes cooling.

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Vishnu , added an answer, on 12/5/16
6 helpful votes in Science
In an open vessel , the liquid keeps on evaporating . The particles of liquid absorb energy from the surroundings to regain the energy lost during evaporation . This absorption of energy from the surroundings make the surroundings cold.
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Anuvinda Murali , added an answer, on 21/5/12
473 helpful votes in Science

Evaporation causes cooling.

For instance, take a example of earthern pot, now you will wonder how water in the earthern pot is cool throught. How do this happen?

Ans. Earthern pots contains small pores on their surface. which helps in the evaporation and by evaporation the heat is absorbed and the water in the pot remains cool.

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Krishnan Unni , added an answer, on 21/5/12
1919 helpful votes in Science

Evaporation is one of the four principal ways that heat can be transferred (the other three are radiation, convection, and conduction). Evaporation of sweat from the skin is an endothermic reaction: the reaction essentially "consumes" heat, which cools the body in the process.

For a liquid to turn into gas, either by boiling or evaporation, energy is required. This is known as the latent heat of vapourisation. In the case of boiling this is provided by external heat sources but in the case of evaporation it has to come from within the liquid itself, thus cooling it.

The energy is required to break the strong bonds between the molecules in the liquid and allow them to break free in gaseous form.
Evaporation is an endothermic (heat-absorbing) process because molecules must be supplied with energy to overcome the intermolecular forces.

Evaporation occurs at the surface of a liquid, and energy is required to release the molecules from the liquid into the gas. The use of this energy, known as latent heat, causes the temperature of the liquid to fall

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Pratyush Dhiman , added an answer, on 21/5/12
4 helpful votes in Science

Evaporation is one of the four principal ways that heat can be transferred. Evaporation of sweat from the skin is an endothermic reaction: the reaction essentially "consumes" heat, which cools the body in the process.


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Sankha Subra Ghosh , added an answer, on 22/5/12
34 helpful votes in Science

Due to evaporation only high energy particles live the surface. this result in decrease of averagekinetic energy of the particles in the system . Kinetic energy is related to tempreture. As result there is a dropin tempreture of the system. Thus, evaporation cause cooling.

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Ppkk , added an answer, on 14/4/17
7 helpful votes in Science
fill in the blanks;
1.latent heat of fusion is the amount of heat energy required to change 1 kg of solid into liquid at its...
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Sahil Gangwar , added an answer, 1 month, 1 day ago
2 helpful votes in Science
When any liquid evaporates it takes the heat from its surroundings.Hence, the heat of that area is lost and it becomes cool.
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Minu , added an answer, on 21/4/17
2 helpful votes in Science
evaporation provides cooling in air and evaporates in air therefore we fell cool
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Parv Ashwani , added an answer, on 4/5/16
5 helpful votes in Science
Evaporation causes cooling when the "heat of evaporation" is positive. This is defined as the heat taken up by the phase transition from liquid to vapor. For water, the heat of evaporation is unusually large, so it take away so much heat, the surface it evaporates from is significantly cooled.
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Alan Shaji , added an answer, on 28/1/17
5 unhelpful votes in Science
evaporation causes cooling because, when evaporation process happens, the hot air in the lad rises up and cool air left over.
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Krishna Vamshi , added an answer, on 8/3/17
2 helpful votes in Science
In evaporation particles change their state from liquid to gas.in this process to overcome the attraction force between particles they gain energy and take energy along with them so we feel cool after our sweat evaporates
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Alan Shaji , added an answer, on 26/1/17
5 unhelpful votes in Science
because the evaporated water takes away the heat, and remains the surface cool as the heat has gone with it
 
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Mounica Gangavaram , added an answer, on 21/5/12
48 helpful votes in Science

evaporation is an enndothermic process i.e., the liquid absorbs heat evapouration. this heat may be provided by liquid itself or by the surroundings. on evapouration, the liquid takes heat from the surroundings. on evaporation, the liquid takes place from the other parts of the liquid, thereby cooling down. on the other hand, if the liquid takes place from the surrouindings, it causes the cooling of the surrouindings.

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Alina Ahmed , added an answer, on 21/5/12

Liquid and Vapor

  • Liquid evaporating from a surface has a cooling effect. And different liquids have this effect to different degrees. For example, rubbing alcohol has more of an evaporative cooling effect than does water. Alcohol is what is called a volatile liquid, meaning simply that it evaporates comparatively more quickly than water. But regardless of the liquid, the principle of evaporative cooling is the same. The idea is that in its liquid state, the substance---whether water or alcohol---has a certain heat content. Critical to this are two of the three basic phases of matter: liquid and vapor. (The solid phase is, of course, the third.)

Heat

  • When a liquid evaporates, its molecules convert from the liquid phase to the vapor phase and escape from the surface. What drives this process is heat. In order for the molecule to leave the liquid surface and escape as a vapor, it must take heat energy with it. The heat that it takes with it comes from the surface from which it evaporated. Since the molecule is taking heat with it as it's leaving, this has a cooling effect on the surface left behind.



Read more: How Does Evaporation Cause Cooling? | eHow.com http://www.ehow.com/how-does_5315235_evaporation-cause-cooling.html#ixzz1vWOoPvzn

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Rishav , added an answer, on 7/6/14
8 helpful votes in Science

This is because the latent heat of vapourisation required by the subsyance to evaporate absorbs it from the substance that is in contact with it .also evaporation absorbs around 2,488 joules of heat.

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Gayathri P Kumar , added an answer, on 21/5/12
30 helpful votes in Science

during evapourisation, particles of the liquid gain energy from the surroundings to overcome the force of attraction between them. as a result, loss of heat energy occurs in the surroundings. that is why evapourisation causes coolng sensation.

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Aarush , added an answer, on 11/6/16
1 helpful votes in Science
When the water gets evaporated using the energy present in the surrounding it drcrease the forces of attraction and cause the water to cool.
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Lakshita , added an answer, on 13/6/15
3 helpful votes in Science
It is because the water absorbs heat and evaporates by leaving the surface cool. PLZ HIT LIKE 👍 IF U LIKE MY ANSWER
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H.v Lekhana Patel , added an answer, 2 weeks ago
2 helpful votes in Science
I have 2 answers. you can choose which convinces you the most:

a) Evaporation leads to cooling because high energy molecules leave the surface (evaporation is a surface phenomenon) and average energy of remaining molecules decreases, which results in drop in temperature of the part of liquid that is left. Therefore, evaporation causes cooling.
b) The particles of the liquid absorb energy from the surroundings to regain the energy lost during evaporation.This absorption of energy from the surroundings make the surroundings cooler. Therefore we say, evaporation causes cooling
 
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Shreyas Om , added an answer, 3 days, 6 hours ago
4 helpful votes in Science
As we know that water is a conductor of heat ,so when it comes in contact with any heated object it absorbs the hwat and evaporates creating a cooling effect.
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Ppkk , added an answer, on 14/4/17
7 helpful votes in Science
sry.. by mistake i send the above question..as an answer....
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Chasmi Chasmi , added an answer, 3 weeks, 6 days ago
9 helpful votes in Science
During evaporation, the water absorbs heat from the surrounding area to overcome the force of attraction. So when all the water has evaporated the area where the water was spilt is cooler.
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Niti Patel , added an answer, 3 days, 21 hours ago
5 helpful votes in Science
beacase to evaporate every substance requires heat energy, to get this required amount of heat energy the substance absorbs heat either from the surroundings or from itself. if it absorbs the heat from the surroundings the surroundings get cooler as it looses heat energy, whereas if it absorbs heat from itself then the substance itself get cooler as it loose its heat energy. thus evaporation causes cooling
 
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Lohit Samotra , added an answer, on 29/5/12

because the latent heat of vapourisation required by the subsyance to evaporate absorbs it from the substance that is in  contact with it .also evaporation absorbs around 2,488 joules of heat

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Shubham Haiburu , added an answer, 3 days, 5 hours ago
  • Evaporation causes cooling naturally. The underlying principle behind this is, in order to change its state, matter must either gain or lose energy. In the case of change of phase from liquid to gas, molecules of matter require energy to overcome their potential energy by their kinetic energy. So, the liquid takes this energy from its surroundings.
  • Generally, when energy transfer occurs, it results in an increase or decrease in temperature of the substance, depending on whether the energy is being transferred from the substance to the surroundings or vice versa. However, there are exceptions to this rule.
  • Although there is an increase in temperature of the substance till the boiling point is attained during evaporation, phase change results in no observable heat transfer.
  • The molecules of the substance absorb heat energy continuously from the surroundings and thus cool the surroundings till they reach the boiling point, after which they start to break free from the liquid and turn into vapour. Since there is no change in temperature till the evaporation process is complete i.e. the entire liquid gets converted into vapour, the amount of energy required for this phase change is called the latent heat of vaporization, where the word ‘latent’ means ‘hidden’, meaning this heat will not change the temperature reading on a thermometer.
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Aryan Rajput , added an answer, 3 days, 5 hours ago
2 helpful votes in Science
due to latent heat of vapourisation ..during evaporation the surrounding water loses heat which helps in cooling ...as the water loses heat ...it also loses it energy ....as soon as the energy is absorbed the surroundings cools ..on a hot dry summer day the rate of cooling will increase as the rate of evaporation will be increased   ...hoping it will be very helpfu if any mistake please tell me ..good day
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Siddharth , added an answer, 3 hours, 42 minutes ago
2 helpful votes in Science
Evaporation causes cooling because particles gain heat energy from surroundings and it causes cooling
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Siddharth Ranjan , added an answer, 2 weeks, 3 days ago
2 helpful votes in Science
When liquid is kept in an open vessel, it start to evaporate. The particles of liquid absorb energy from the surrounding
to regain the energy lost during evaporation. This absorption of energy from the surrounding makes the surrounding cool.
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Aryan , added an answer, 2 weeks, 5 days ago
It is because evaporated of liquid due to getting heat to convert into gase so the liquid getting heat from our surrounding then our surrounding makes cool.
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Saket Agrawal , added an answer, on 28/10/14
because it is surface phenomenon so when the sun rays come on surface of water then its surface get heated and evaporates and the lower layer of water will be cool
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Tanmay Mehta , added an answer, 4 weeks, 1 day ago
The water get heat or energy for the place where it kept and after taking heat it convert into kinetic energy and the surrounding cools
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Vinay , added an answer, 3 weeks, 1 day ago
1 helpful votes in Science
see when its hot we sweat.
when we sweat we switch on fan
when fan rotates the sweat evaporates using the heat from our body
this leads to decrease in our body temperature
hence we fell the coolness.
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Hardik Madan , added an answer, 3 weeks, 1 day ago
5 helpful votes in Science
evaporation causes cooling because evaporating particles absorb the heat from other particles
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Manmohan Singh , added an answer, on 25/9/16
73 unhelpful votes in Science
hvngb
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Ayush Chaudhary , added an answer, on 14/5/15
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Every action has a equal and opposite reaction.
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Rudresh Kumar Dubey , added an answer, on 7/4/17
24 helpful votes in Science
?evaporation causes cooling as when a liquid evaporates it absorbs the latent heat of vapourisation from its surroundings to regain the energy lost during evaporation.?This absorbtion of energy from the surroundings makes the surroundings cool. I hope it was useful for all of you.
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