18th November 2019

quora

15

How does evaporation take place?

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During evaporation, water is not turning into a gas or steam, but random movement of molecules on the surface of water provides some of the molecules enough energy to escape from the surface into the air. Evaporation takes place only on the surface of the body of water.

How long does it take for the water to evaporate?

According to these web sites, the average time a water molecule spends in the atmosphere is 8-9 days. This is pretty fast! So on average, it takes just 8-9 days for a water molecule to evaporate, enter the atmosphere, and then leave it again as rain.

How does water evaporate?

When liquid water meets dry air, it is not in equilibrium; water molecules evaporate off the surface until the amount of water in the air creates enough vapour pressure to achieve equilibrium. When water is heated to a temperature of 100C, the vapour pressure equals that of sea-level air pressure.

1

Where does evaporation take place in a liquid?

It turns out that all liquids can evaporate at room temperature and normal air pressure. Evaporation happens when atoms or molecules escape from the liquid and turn into a vapor. Not all of the molecules in a liquid have the same energy.

2

How do you evaporation and boiling differ?

Evaporation and boiling are both processes that take place in liquids where a change of state occurs liquid → gas. When evaporation occurs, particles only change into gas at the surface of the liquid. When boiling occurs particles change from liquid to gas throughout the whole liquid.

3

What is the process of evaporation?

Evaporation is the process by which water changes from a liquid to a gas or vapor. Evaporation is the primary pathway that water moves from the liquid state back into the water cycle as atmospheric water vapor.

4

Do atoms gain energy during evaporation and boiling?

Atoms lose energy as a gas changes to a solid. Which statement best describes the energy changes associated with evaporation and boiling? Atoms gain energy during evaporation and boiling. In which changes of state do atoms lose energy?

5

Why warm water will evaporate faster than cold water?

Water is made up of tiny molecules that are always moving around. The constant movement builds up energy that eventually causes water to evaporate. However, cold water will evaporate much slower than it would if it was hot. When water is hot, the molecules move much faster leading to a quicker evaporation.

6

What is the main cause of evaporation?

Evaporation is the change of water from a liquid to a gas. Water is continuously evaporating from the surface of the Earth, literally pumping more and more water vapor into the atmosphere. For both water and land surface, most of this heat energy comes from the surface, not from the air.

7

How does water evaporate?

When liquid water meets dry air, it is not in equilibrium; water molecules evaporate off the surface until the amount of water in the air creates enough vapour pressure to achieve equilibrium. When water is heated to a temperature of 100C, the vapour pressure equals that of sea-level air pressure.

8

Is evaporation exothermic?

Evaporation is endothermic because water molecules must absorb heat from the surroundings to increase their kinetic energy. One familiar example is sweat, which cools the human body as it evaporates from the skin.

9

Why is the process of evaporation cooling?

As perspiration evaporates it absorbs heat to cool your body. The principle underlying evaporative cooling is the fact that water must have heat applied to it to change from a liquid to a vapor. When evaporation occurs, this heat is taken from the water that remains in the liquid state, resulting in a cooler liquid.

10

How does evaporation occur and why does it cause cooling?

The remaining particles in the liquid have a lower average kinetic energy than before, so the liquid cools down as evaporation happens. This is why sweating cools you down. The sweat absorbs energy from your skin so that it can continue to evaporate.

11

What is evaporation short answer?

Evaporation is the process of a substance in a liquid state changing to a gaseous state due to an increase in temperature and/or pressure. Evaporation is a fundamental part of the water cycle and is constantly occurring throughout nature.

12

What happens to the water during evaporation?

Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor. Evaporation is a very important part of the water cycle.

13

How does condensation happen?

Condensation happens one of two ways: Either the air is cooled to its dew point or it becomes so saturated with water vapor that it cannot hold any more water. Dew point is the temperature at which condensation happens. When warm air hits the cold surface, it reaches its dew point and condenses.

14

What would happen if water did not evaporate?

Heat from the sun causes water to evaporate into a water vapor, a gas. If water did not evaporate what would happen? Water would accumulate in the streams, and rivers and runoff into the ocean. Water would not cycle back up into the atmosphere and it would not rain.

15

Why do some liquids evaporate more quickly than others?

Some liquids evaporate faster than others because they are more volatile than the others. Their particle's force of attraction is less from others. So, they requires less heat to overcome the force of attraction between the particles.

16

How does evaporation cause cooling explain with example?

When evaporation occurs then than the liquid (mostly water) absorbs all the heat from the surroundings and take it with it and we feel cool. evaporation causes cooling effect because the heat energy is abosorbed by surrounding particles.

17

How does evaporation drive the water cycle?

The sun, which drives the water cycle, heats water in the oceans. Some of it evaporates as vapor into the air; a relatively smaller amount of moisture is added as ice and snow sublimate directly from the solid state into vapor.

18

What is the evaporation in chemistry?

Evaporation is one of the two forms of vaporization. It is the process whereby atoms or molecules in a liquid state (or solid state if the substance sublimes) gain sufficient energy to enter the gaseous state. It is the opposite process of condensation.

19

Where does condensation take place?

Condensation near the ground. Condensation also occurs at ground level, as this picture of a cloud bank in California shows. The difference between fog and clouds which form above the Earth's surface is that rising air is not required to form fog.

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