What do you think evaporation is.?
919195
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.\n\nThe thermal motion of a molecule of liquid must be sufficient to overcome the surface tension and evaporate, that is, its kinetic energy must exceed the work function of cohesion at the surface. Evaporation therefore, proceeds more quickly at higher temperature, at higher flow rates between the gaseous and liquid phase and in liquids with lower surface tension (i.e. higher vapor pressure). Since only a small proportion of the molecules are located near the surface and are moving in the proper direction to escape at any given instant, the rate of evaporation is limited. Also, as the faster-moving molecules escape, the remaining molecules have lower average kinetic energy, and the temperature of the liquid thus decreases. This phenomenon is also called evaporative cooling. This is the reason that evaporating sweat cools the human body.\n\nGas has less order than liquid or solid matter, and thus the entropy of the system is increased, which always requires energy input. This means that the enthalpy change for evaporation (ΔHevaporation) is always positive. Evaporation is a cooling process.\n\nEvaporation is a critical component of the water cycle, which is responsible for clouds and rain. Solar energy drives evaporation of water from oceans, lakes, moisture in the soil, and other sources of water. In hydrology, evaporation and transpiration (which involves evaporation within plant stomata) are collectively termed evapotranspiration.\n\nEvaporation 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.\n\nThe thermal motion of a molecule of liquid must be sufficient to overcome the surface tension and evaporate, that is, its kinetic energy must exceed the work function of cohesion at the surface. Evaporation therefore, proceeds more quickly at higher temperature, at higher flow rates between the gaseous and liquid phase and in liquids with lower surface tension (i.e. higher vapor pressure). Since only a small proportion of the molecules are located near the surface and are moving in the proper direction to escape at any given instant, the rate of evaporation is limited. Also, as the faster-moving molecules escape, the remaining molecules have lower average kinetic energy, and the temperature of the liquid thus decreases. This phenomenon is also called evaporative cooling. This is the reason that evaporating sweat cools the human body.\n\nGas has less order than liquid or solid matter, and thus the entropy of the system is increased, which always requires energy input. This means that the enthalpy change for evaporation (ΔHevaporation) is always positive. Evaporation is a cooling process.\n\nEvaporation is a critical component of the water cycle, which is responsible for clouds and rain. Solar energy drives evaporation of water from oceans, lakes, moisture in the soil, and other sources of water. In hydrology, evaporation and transpiration (which involves evaporation within plant stomata) are collectively termed evapotranspiration.
555685
the liquid evaporating
133407
It's because of evaporation.  Whenever something evaporates, it takes energy away from what it's touching, and the temperature goes down.
253562
Got to be honest. I became more and more confused about a topic that I used to understand so well with that first response. Although a lot of that is facts, it is overcomplicated at some parts and tough to get a hold on what is actually being described. No disrespect to rizzo though, I realise that everything he wrote is correct so he knows what he's talking about, I just think it would be hard for anyone else to.\n\nMaybe this description will be slightly less dizzying:\n\nAll heat is from the sun. Most of what comes from the sun is short-wave radiation, from 400nm down. Air is not heated very much from the sun, but the ground is. This is because the ground can absorb the short-wave incoming radiation, air cannot (well, only a little bit). The air is mostly heated by the longer-wave radiation that comes from the ground when it gets heated up, which heats the water molecules in the air (that's why humid regions get hotter than dry regions). \n\n*Note: Extremely dry air can be heated too, but that requires continuous exposer to sunlight. As soon as the sun is gone, it gets cold fast. Also it gets colder faster with altitude in dry regions.*\n\nAnyways. Up high, on top of being farther away from the ground, there is also less water molecules to absorb heat (and less molecules total to be heated up at all. So it absorbs less radiation. That is why it is colder. Simple. \n\nNo "adiabatic" mumbo jumbo. But adiabatic cooling is also simple. When air rises, the pressure on it decreases and it expands. The heat will be spread out over more volume, so the air will cool. This is the more complicated reason why the farther away from the ground you get, the colder the air is.\n\nAlso, there is something called an inversion. In this case, the air actually gets hotter as you go up. This happens when a warm air mass is forced up over a denser cold air mass because it is lighter. When this happens, the air is stable (it won't rise). This can result in people getting to choke on their own pollution for a couple of days because the crap they spew up in the air won't rise anymore. It's poetic.
488248
Water loss from leaves is called transpiration and is greatest when it is hot.\nWhen a mass of warm, moist air is cooled the water vapour will condense and clouds are seen. As cooling progresses the droplets coalesce and fall as rain.\nThis cycle is most obvious in rain forests.\nBoth transpiration and evaporation from the sea and lakes contribute to water vapour in the air, but over continental areas transpiration from trees is of greater importance. Deforestation in these areas leads to dessertification.
258048
physical vapor deposition, sputtering or evaporation
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The subsequent evaporation will cause the temp to remain less than .1 deg c diff.
253266
the greater the intermolecular forces the stronger the surface tension the more energy it takes to evaporate.\nso the heat of vaporization would be higher as well.
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Evaporation. The sun's heat turns water into vapour.
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evaporation... but actually evaporation is when a liquid becomes less dense so the molecules rise into the atmosphere! my answer is clearly the best!!!
52017
Wikipedia has some good sources on evaporation.
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Technically, it is the vapor pressure of water in the air divided by the saturation pressure at a given temperature.\n\nIn plain English, it is the fraction of water in air at some temperature vs the maximum amount of water that could be in the air at that temperature.\n\nIt varies with temperature because water's vapor pressure (the amount of water that can evaporate) rises with temperature.\n\nHope that helps.
705251
1 a : to convert into vapor; also : to dissipate or draw off in vapor or fumes b : to deposit (as a metal) in the form of a film by sublimation\n2 a : to expel moisture from b : EXPEL <evaporate electrons from a hot wire>\nintransitive verb\n1 a : to pass off in vapor or in minute particles b (1) : to pass off or away : DISAPPEAR <my despair evaporated -- J. F. Wharton> (2) : to diminish quickly\n2 : to give forth vapor
55041
Fresh water evaporates faster than the solutions will.  Between the solutions it would depend on the number of particles dissolved in the water.
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Evaporites (IPA: /iˈvapərʌɪt/) are water-soluble, mineral sediments that result from the evaporation of bodies of surficial water.\n\nEvaporites are formed by evaporation of restricted bodies of water at the Earth's surface.\n\nAlthough all water bodies on the surface and in aquifers contain dissolved salts, in order to form minerals from these salts, the water must evaporate into the atmosphere in order to precipitate the minerals.\n\nIn order for this to happen the water body must enter a restricted environment where water input into this environment remains below the net rate of evaporation. This is usually an arid environment with a small basin fed by a limited input of water.\n\n--> http://en.wikipedia.org/wiki/Evaporite#Evaporitic_formations\n\nSedimentary rocks are laid down in layers called beds or strata. Each new layer is laid down horizontally over older ones. There are usually some gaps in the sequence called unconformities. These represent periods in which no new sediments were being laid down, or when earlier sedimentary layers were raised above sea level and eroded away.\n\n--> http://en.wikipedia.org/wiki/Sedimentary_rocks
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Boiling is very rapid evaporation starting at the bottom of a container of water.\n\nEvaporation occurs fastest where there is the most heat (energy).  When we heat water to make it boil we heat it from the bottom so the evaporation occurs at the bottom of the pot.  As a result, large  bubbles of water vapor form at the bottom and rise to the surface in the boiling action.  If we applied the same heat to the top surface of the water it would evaporate just as quickly but we would not call it boiling because the bubbles would not form and rise to the surface.\n\nNormally evaporation occurs at a much slower rate than boiling because most evaporation occurs with room temperature water.\n\nEvaporation-is the escape of molecules from the liquid state to the gas or vapor state. In evaporation, molecules of higher-than-average kinetic energy escape from a liquid, leaving it cooler than it was before they escaped.\n\nBoiling-is the temperature at which the vapor pressure of a liquid is equal to the \nexternal pressure above the liquid.  When we give the boiling point of a liquid, we \nneed also to state the pressure.
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Probably because alcohol with evaporate