at what temperature does water evaporate at?

Question

just wondering if anybody knew

Answer 1

it will evaporate at any temp above freezing. below freezing, and water is ice, then it will ?sublimate? disapear straight from solid to gas.

Answer 2

Why Does Water Evaporate

Answer 3

Water "evaporates" at all temperatures. If you leave water standing long enough, it will dry up. Now, water does "boil" at 212F and 100C, but that is at sea level. As the air pressure changes, so does the boiling point. Decrease the pressure and water turns into a vapor at lower temperatures. Increase the pressure and the boiling point increases. It is ever possible to make water "boil" frozen. This is freeze drying. There is also critical point. After this critical point, no amount of pressure will make it turn back into a liquid. Above this temperature, the substance is officially called a gas. The critical point for water is about 300C. This is important because this is what causes nuclear meltdowns. When the water stops flowing, heats up, and doesn't have a chance to cool, eventually it will pass the critial point. This is when the pressure jumps up, and the nuclear reactor can't handle it-it explodes.

Just a little information for when you order that At Home Nuclear Reactor.

Answer 4

There is no temperature to evaporate water. Water evaporates over a period of time. Heat can make it evaporate faster.

Answer 5

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RE:
at what temperature does water evaporate at?
just wondering if anybody knew

Answer 6

Water evaporates at all temperatures, just at different rates.

If it's cold, ice can evaporate, it's called sublimation.

The net rate of evaporation is determined by the water vapor pressure (the urgency of vapor to escape from the liquid water), which depends on temperature. It also depends on the air pressure (the resistance to water vapour escaping), and the relative humidity (the amount of water vapor already present in the air, trying to get back into the liquid state).

If the water vapor pressure exceeds that of the surrounding air, it boils. You can make cold water boil, just by putting it into a vacuum.

Answer 7

It's all about thermodynamics, equilibrium and vapor pressure in particular. Not a simple question at all. I agree with those who have said it can evaporate at all temps (I will modify to all temps and conditions) at which the water is in liquid form and the vapor pressure gradient is not zero in the direction of evaporation. If the ambient air has zero humidity (no water vapor) then water will evaporate as long as it is true that the vapor pressure is positive in the liquid. I think this is if the liquid state is in equilibrium with the environment. Maybe even if not?

Answer 8

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Evaporation takes place at all the temperatures.As per Maxwell-Boltzmaan distribution of moleculer velocities there are always some molecules having enough velocity to escape the surface tension of the water.Now as we heat the water more and more molecules acqure escape velocity so rate of evaporation increase.But when the vapor pressure becomes equal to the atmospheric pressure boiling starts,Since More molecules are leaving the average energy does not change and temprature becomes constant.This is the Boiling point and this phenomena is called phase change.The atmospheric preesure plays important role.If Atm.pr is increased water will boil at higher temp. and it is lowered water will start boiling at lower temperaure. IVAN

Answer 9

Every temperature. Even below freezing.

How much evaporates depends on the temperature and pressure. By pressure I mean absolute pressure and partial pressure due to water vapor or the relative humidity.

I think you're asking at what temperature and pressure can water only exist as a vapor (ignoring metastability and assuming an open-ended container)? Then 100º C at 1 atm pressure for pure water.

Answer 10

water needs to be liquid with an interface to a gas (such as, but not necessarily, air) for evaporation to occur.

Pressure will impact when water will be a liquid (for example at standard pressure water is a liquid from 0 to 100 degrees C).

Water in other states does not evaporate...Ice sublimates (turns directly from solid to gas) while steam is already a gas.

Answer 11

Water evaporates at any temperature. Even if the water's ice, it can still evaporate, too. Water evaporates faster as the temp rises. It can start evaporating if the air temp is below freezing. The reason it evaporates is the air molecules receive enough energy and get excited enough that they change phase (go from liquid to gas). The higher the temperature, the faster they evaporate.