Evaporation and Condensation

Evaporation is an endothermic process that is the conversion of a liquid to the vapor state by the addition of latent heat. Condensation is a type of chemical reaction in which water or another simple substance is released by the combination of two or more molecules. The term is also used to describe the process by which a gas or vapor changes to a liquid. In weather, evaporation occurs when water on the earth changes to water vapor and enters the atmosphere. The opposite of evaporation, condensation transforms water vapor in the atmosphere into a liquid, often resulting in precipitation, most commonly in the form of rain or snow.

8,940 Questions
Science
Evaporation and Condensation
Chlorine Bleach

Why does bleach evaporate faster than water?

Bleach can be many things. In general though, solutions evaporate more slowly than pure liquids, because they have lower vapour pressures so we would not expect this to be true.

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Science
Biology
Botany or Plant Biology
Evaporation and Condensation

Is transpiration faster than evaporation?

My first guess would be that they evaporate at the same speed, trick question. My second guess would be that the leaves are higher, and there's much less water on the plant, so it would evaporate faster; that's not taking into account shaded areas. To me, transpiration -is- evaporation, so it's the same speed. But don't take my word for it. My first guess would be that they evaporate at the same speed, trick question. My second guess would be that the leaves are higher, and there's much less water on the plant, so it would evaporate faster; that's not taking into account shaded areas. To me, transpiration -is- evaporation, so it's the same speed. But don't take my word for it.
TRANSPIRATION is The act or process of transpiring, especially through the stomata of plant surface .

while

EVAPORATION is Conversion of a liquid to the vapor state .

Evaporation is faster as compared to evaporation . Many factors are involved in it.

Most transpiration takes place during day while evaporation day and night .

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Swimming Pools
Pool Care and Cleaning
Evaporation and Condensation

How much water evaporates from a pool?

Water Evaporation from a Pool

The evaporation rate depends on the surface area of the pool, the temperature, and the relative humidity and the wind. I'm sure an "equation" containing the variables is known. Perhaps a civil or mechanical engineer would have a specific equation. I did find what seems to be a credible source that provides a reasonable answer. Here is the link: Marin municipal water district. They have a chart that lists 200-300 gallons per week for a medium-sized pool -- about 2%-5% of typical pool volumes. "Splash-out" water is probably a much more significant source of water loss.

Here are more opinions and answers:

  • In my 14 years of experience, I found that there are a lot of circumstances involved in how much water is lost during evaporation. The best way to find out how much water your pool is losing is the following:

    Take a 5-gallon bucket and make a mark with a permanent marker at about the halfway point. Fill the bucket with water up to that point, and set the bucket right beside your swimming pool. Simultaneously, use a pencil to mark the water level on your pool tile. In that way, your can determine how much water has evaporated from the bucket and from the pool.

  • The evaporation rate of water from a swimming pool is fairly easy to calculate; given you have access to a psychometric chart or a water vapor tables. W=(A (69.4+30.8 (V)) / Y )(Pw-Pa) W = lb / hr of evaporation. A = surface area of the swimming pool. V = mean wind velocity (mph). Y= Latent heat (approx. 1000). Pw - Sat. Press at Room Air temp (in Hg). Pa - Sat. Vapor press at water temp (in Hg)
  • Wow! Who has enough time on their hands to run complicated math formulas. A simple rule of thumb in the pool industry is that 1/2" to 1" per day is normal evaporation. Evaporation more than 1" per day would indicate a considerable amount of splash-out or a water leak.
  • The above answer is completely incorrect!! I have worked in the pool industry for over 30 years, and I am currently a leak detection professional who teaches my craft at the swimming pool convention. I am also a founder of an international alliance of swimming pool leak specialists. 1/2" to 1" per day is not a general rule of thumb in the pool industry and is excessive! Use a bucket of water set next to your pool to determine how much water evaporates in your area. Even two pools at neighboring properties can have different evaporation rates due to differing environments.
  • In different areas the rate of loss varies, but in Houston, Texas, we figure on evaporation of 1" to 1.5" per week during the summer.
  • Some people don't realize that water evaporation is much greater in the fall than in the summer -- when water temperatures are high and air temperatures are cold (especially at night). This will just suck the water right out of the pool.

    I am sure there are a lot of variables regarding geographic location and humidity levels. In the Mid-Atlantic, I would consider anything over 1/2" per day the mark to start looking for problems (unless you have a heated spa or waterfall, etc.).

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Science
Chemistry
Evaporation and Condensation

Graph does salt or sugar water evaporation?

Yes. The water will evaporate and leave the residue of salt or sugar. A process crystalization is also there from which solids are purified from liquids by heating and then cooling, leaving purified crystalals.

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Swimming Pools
Evaporation and Condensation

How do you measure the water evaporation from your swimming pool?

With a ruler.

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Chemistry
Evaporation and Condensation

How does evaporation cool down a fire?

evaporation takes away heat from the fire thereby reducing it's energy.

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Chemistry
Earth Sciences
Evaporation and Condensation

What is the difference between condensate and water?

Unless any extra particles/sediments collected on the water particles(gas), they do not differ. Condensate is just when water particles(gas), have collected on an object after evaporation, and this process runs all on water. One example is when after you take a shower, the steam, (water particles/gas), collects on a mirror and drizzles down the mirror. This ends up being water!!!

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Chemistry
Evaporation and Condensation

Is it evaporation when a puddle of water dries up?

Yes, and it is in the form of gas in the air!

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Science
Evaporation and Condensation

Why does condensation form on a glass of iced tea?

There is always water in the air in its gaseous form. When air is warmer it can hold more water before the water begins to condense and form into droplets. That's why you hear about relative humidity in the weather report - if the relative humidity is 50% it means that there is about half the maximum amount of water in the air that it can hold at its current temperature.

So the bottom line is, when air cools it can hold less water. Your glass of iced tea cools the air around it, the air can no longer hold all of the water that is in it and the water condenses onto the surface of the glass.

You would find that there would be more condensation in more humid weather.

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Evaporation and Condensation

What is evaporation?

Evaporation is the process of liquid turning to gas by the folowing mechanism:

  • The fastest moving molecules (those with the highest kinetic energy) at the surface of the liquid have enough energy to break the attractive bonds with other molecules. They then escape the surface of the substance. Obviously, this only occurs with the molecules at the surface of the substance.
  • Since at higher temperatures the molecules have more kinetic energy, more of them are likely to escape, and so evaporation occurs more quickly at higher temperatures.
  • In general, evaporation occurs because systems seek equilibrium (there is a low concentration of molecules in the air, and a high concentration in the liquid).

What Happens When A Liquid Evaporates?

In a liquid, the particles are moving very quickly. At the surface, some of the particles are able to escape into the air, while others do not have enough energy to escape and remain in the liquid. As high energy particles escape, the average energy of the remaining particles is less and so the liquid cools. The cool liquid then cools the surface on which it is resting. This is called evaporative cooling. It is common and useful in many situations:

Joggers cooling down as their sweaty clothes dry out

Water cools down a roof on hot summer day

A wet cloth is placed on your forehead when you have a fever

This is a brief meaning of evaporation,Evaporation occurs when aliquid changes its state to form a gas or vapor

Well evaporation is when some water in a puddle or any sort of water is raised into the air but you cant se it. When it is in the clouds it forms clouds of condensation then comes down as percipitation.Then it goes in the water cycle then starts over again
the change of state for a liquid to a gas

Water and other liquids start to boil if they are heated to their boiling temperatures. The liquid starts to transform into vapors but the change of liquid into vapors goes on even when the temperature is below the boiling point. For example, when wet clothes are hung on the line, they get dry. Water present in clothes changes into vapors and disappears into atmosphere similarly, if small amount of water is left in a pot in the open air, it soon disappears. This water too changes into vapors and disappears. This phenomenon of changing of liquids into vapors without boiling is called evaporation.

Experiments have shown that evaporation of liquids depends on the following factors:

1- nature of liquid: some liquids have low boiling point, they evaporate more quickly

2- temperature of liquid: if the surface temperature is high, evaporation rate increases

3 -surface area of liquid: if the surface area of the liquid is increased evaporation rate also increases.

4- dryness of air: drier the air, quicker is the rate of evaporation.

5-wind speed higher the wind speed, greater is the rate of evaporation.

6-air pressure on the surface of liquid: if the pressure on the surface of the liquid is lowered, its rate of evaporation shoots up.
Evaporation is a stage in the water cycle, where water evaporates and becomes steam or water vapor. Ex: It's summertime. Say you left your pool outside with no cover on top. It was really hot and the sun was shining very bright. The heat will make the water in the pool, turn into water vapor. The water vapor (air) will rise into the clouds as a gas. This is known as evaporation. When the clouds fill up with enough water, it starts to rain. This is known as condensation. The water goes back into the pool. So you never lose any water, it comes back. This is known as the water cycle.
Evaporation is a liquid that occurs from the surface of a liquid into a gaseous phase. This type of liquid vaporizes.
when water turns to steam or air only fomr the top

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Evaporation and Condensation
Organic Chemistry

Does evaporation occur in the fridge?

yes, it does

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Science
Science Experiments
Evaporation and Condensation

Is energy absorbed during freezing?

depends on your point of view, but... it's not really absorbed in the strictest sence. by "freezing", i'm assuming you're intent is to say you are taking some substance, say water at room temperature, & then freezing it (lower it's temperature to or below the point at which the water becomes frozen).

what happens to the energy is, it is transferred out of the water, to somewhere else. if using a common refrigerator/freezer, the heat energy from the water is transferred to the air outside the frig, by use of gas compressor in the frig. a simpler way to look at it (but essentially the same thing... just a "one shot" in a sense) would be by using some compressed gas like liquid nitrogen & spraying the water with the liquid nitrogen. since liquid nitrogen boils at roughly -320 f (195.79 C), you would be transferring much of the heat energy stored in the water, into the liquid nitrogen, thus freezing it.

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Evaporation and Condensation

Does water need sunlight to evaporate?

Yes it does

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Evaporation and Condensation

Can you justify a solar cover with savings from evaporation heat and chemical loss for a large commercial pool?

65% of your heat loss, especially in a large commercial pool, is through convection and evaporation. Convection is heat transfer from surface to air through wind speed and the difference between air and water temperature. Evaporation is converting water to vapor and requires a lot of energy and makes up the largest percentage of heat loss(50%).Having a pool cover, solar or otherwise, reduces convection and evaporation by approximately 90%.

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Rain and Flooding
Evaporation and Condensation

Key words in water cycle?

evaporation, condensation, precipitation, infiltration, sublimation, runoff...

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Chemistry
Clouds
Evaporation and Condensation

What is difference between saturated vapor and superheated vapor?

i dont know because im tooo dumb too answer diz question . so will u answer diz for me . post to my wall face book if u have answer it about different between saturated vapour and superheated vapour . my face book is awie yeepi .

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Evaporation and Condensation

What is the application of cyclohexanone?

Applications

By virtue of its high solvent power for

numerous organic substances, cyclohexanone

is used as a solvent in

many branches of industry. Due to the

high purity of the EL grade, it can be

used in various electronic industry applications.

Since it reacts with various

classes of compounds - its reactivity

is typical of an aliphatic ketone - it is

used as a starting material for syntheses.

The main applications are

reviewed below, but the list is by no

means complete.

· Additive for electronic industry

applications.

· Additives in PVC adhesives, mainly

to regulate the evaporation rate.

· Additive in bonding agents for plasticized

PVC film, e.g., for roof

coverings, swimming pools and tunnels.

In temperate climates, it can

be used only in the summer for

regulating the evaporation rate, but

all the year round for exports to

tropical regions.

· Solvent for insecticides and fungicides,

e.g., Perfekthion®.

· Activator in oxidation reactions,

e.g., benzene ® phenol.

· In the manufacture of adipic acid,

AH Salt and nylon 66.

· For the manufacture of cyclohexanone

oxime, caprolactam and

nylon 6

· For the manufacture of herbicides,

spiro compounds, amines, colorants,

vulcanization accelerators,

emulsifying agents, sedatives, hypnotics,

anti-histamines and

catalysts for polyester resins.

· Additives in mercerizing liquors.

· Additive in aluminum soaps for

impregnating fabrics, e.g., camouflage

nets.

· Degreasing agents.

· Additive to improve adhesion of

pigment finishes.

· For improving damaged areas on

leather by finishing, e.g., with

Corial® Finish EC.

· Additive in paints and lacquers, e.g.,

- Cellulose nitrate lacquers (to

prevent blushing)

- Cellulose acetate lacquers (to

improve flow)

- PVC paints

· Solvent for PVC printing inks.

· Raw material for various synthetic

resins, e.g., Laropal K 80.

· Additive in paint removers.

· Secondary solvent for cellulose

nitrate in coating cellophane.

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Evaporation and Condensation

How much heat is lost from pool water evaporation?

187188189
Physics
Science Experiments
Evaporation and Condensation

How does evaporation from a liquid cool it down?

Heat of vaporization.

It takes a lot of energy for something to change state from liquid to gas. That energy is called the heat (or "enthalpy", sometimes, if you want to be pedantic about it) of vaporization.

The energy used to do this comes from taking out some of the thermal energy of the material, which causes it to cool down.

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Evaporation and Condensation

Is dew forming on grass is an example of condensation?

Yes

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Science
Geography
Atmospheric Sciences
Evaporation and Condensation

How does mountain range effect climate?

Mountains can affect the climate of nearby lands. Clouds approaching a mountain are forced to rise, and rising clouds can't hold so much water, so they drop their rain, so the windward side of a mountain range may be rainy and the leeward side may be a desert.

Much of airborne moisture falls as rain on the windward side of mountains. This often means that the land on the other side of the mountain (the leeward side) gets far less rain - an effect called a "rain shadow" - which often produces a desert.

The higher the mountain, the more pronounced the rain shadow effect is and the less likely rain will fall on the leeward side.

(The Windward is the side of a mountain that is facing into the direction that the wind is coming from.

The Leeward side is the wind protected side of a mountain.)

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Evaporation and Condensation

How do you slow evaporation from water bowl?

Place an air-tight cover over the bowl.

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Heating Ventilating and Air Conditioning
DIY Projects
Evaporation and Condensation

What is an Evaporative Cooler?

Update:

Evaporative cooling is just that... using a liquid to cool a space by evaporating the liquid. You can effectively cool air down to the dew point temperature (100% saturated) for given initial conditions. These work best in dry climates. See a psychometric chart for more information. The liquid itself doesn't need to be at a lower temperature than the space you're cooling.

Evaporative cooling is when the cooler liquid that isleft behind and cools the surface it rests upon.

Evaporative Cooler is also known as a swamp cooler. It is a cooling machine which can be used in homes or offices for creating much more efficient surroundings.

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Meteorology and Weather
Clouds
Evaporation and Condensation

Does precipitation cause condensation?

Opposite. Condensation causes precipitation.

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Evaporation and Condensation

Why does a puddle dry up after it rains?

Puddles dry up as the water of the puddles evaporate in the air and turn into water vapours

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