What is the temperature at which water starts to evaporate?

Answer 1

Actually, water will evaporate (although at different speeds) as long as it is a liquid. To prove this, put a cup of water in the sun for a day or two, it will have evaporated at least a little. Next, try the same amount of water in an identical vessel, and put it in the shade for a day or two. You might not notice the difference, but there actually is less water in the vessel.
Everyone who is saying that it evaporates at 100 degrees celsius, or 212 degrees farenheit is wrong. That is the BOILING POINT of water. The highest temp that liquid water can hold at sea level (14.7 pounds per square inch). If you put more pressure on the water, the boiling point also raises. This water is called "superheated".

Answer 2

Water can exist as a liquid from about -40° to 100° (or higher under pressure). It can evaporate at any of those temperatures. Solid water, ice, exists below 0° and that can evaporate too, the process is called sublimation. Whether a water or ice surface evaporates depends on the vapour pressure of the air, not the temperature. If the air is not saturated, evaporation will occur at any temperature.

Answer 3

Most of the water vapour which enters the atmosphere are from the sea surfaces through evaporation .Even at a sea surface temperature of 30 degree celcius,evaporation can take place.It need not to be heated(and is not heated actually) to 100 degree celcius to cause this evaporation.So, the evaporation of water can take place at any temperature above 0 degree celcius.
You could have seen the cement roads giving off steam(evaporation of water) if there is a sunshine immediately after rain.A sea surface temperature of 26.5 degree celcius is enough to produce the water vapour which is required to power the hurricane like a heat engine.

Answer 4

Water boils at 100C (212F) but can evaporate at any temperature above 0C (32F) or while in the liquid state. Below freezing, water (ice) can still evaporate by sublimation which causes ice cubes to shrink in a freezer. Water molecules are constantly leaving water (evaporating) and returning (condensing) at any temperature (even under the lid of a jar of canned tomatoes!). Evaporation is a net loss of water molecules and condensation is a net gain. When humidity is 100% evaporation and condensation are equal and there is no net change but water molecules are still free to come and go depending only upon their instantaneous energy level which is somewhat random.

Answer 5

Water can evaporate at any temperature.

Answer 6

There is no specific temperature. Its all in an equilibrium between the gas phase and the liquid phase.
The vapor pressure of water is 1 atm at 100 °C, that means that all the water is in the vapor phase. But at 0 °C the vapor pressure is still 4.6 mm Hg (6 mbar), so at 0 °C there is still 0.6% of vapor in the air (you can dry your clothes at negative temperatures).
The lowest value I found is 0.000015 mm Hg (0.00002 mbar) at -98 °C.

Answer 7

100 degrees celsius or 212 degrees fahrenheit (at sea level). When hot water boils, it begins to evaporate.

Answer 8

water will evaporate when it is warmer than the surrounding air temp. --- fog is water vapour and that hasn't boiled off at 100C --- 212F. but at a much lower temp.
hope this helps :o)

Answer 9

212 degrees F or 100 decrees C at sea level

Answer 10

the triple point of water is 273.16 kelvin (the point at which it exists in all three forms).