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Water converts to steam at 100 degrees centigrade at sea level. Water can convert to a vapor at any temperature. The temperature of the air dictates how much water vapor can be in the air. The measure of water vapor saturation in air with respect to the temperature is referred to as relative humidity.

An interesting fact is in cold climates the phenomenon of "seeing your breath" is caused when the water vapor in the warm air you exhale comes in contact with the cold air of the environment. The vapor in your breath condenses into small water droplets and that is what you see. This is also very much the same phenomenon that accounts for dew on the grass early in the morning . When the temperature drops the air can't hold as much water vapor and it condenses and collects on surfaces like your car and the grass.

2007-01-03 23:59:23 · answer #1 · answered by Brian K² 6 · 2 0

It's not a matter of steam or vapour....Water boils at 100 degrees, that's all. Boiling means that a given volume of water won't continue to augment it's temperature until it has turned completely into vapour, no matter how much energy you suply to it. The evaporation rates at 100 degrees are just very high, high enough to se the bubbles. But below this temperature there's allways an amount of water molecules that are constantly changing between the liquid and gaseous phases. The hotter it is (from 0 to 99 degrees, for example) the bigger the amount of water molecules that can be gaseous.
If this gaseous molecules are swept away (by the wind, for example) the water molecules that are still liquid will evaporate until the quota has been reached again (at this stage you say the air is saturated, or the humidity has reached 100%). If the "sweeping" is constant, the evaporation (and in the case of plants, transpiration) is constant as well.

Just to be clear: When water boils, it produces vapour. At large amounts, but it is vapour. The thing that moves locomotives is vapour, which is gaseous water.
Steam is when the air that carries the vapour comes in contact with colder air, producing condensation. Steam is Liquid water, in drops so little that it has some gaseous properties when taken as a whole (but the little drops alone are liquid, not gaseous). The steam you see comming out of locomotives is that, it's the vapour that already moved the machine, beeing released into the surrounding, colder air.

2007-01-04 03:02:43 · answer #2 · answered by carlospvog 3 · 1 0

Water vapor is unquestionably a greenhouse gas, and extra water vapor contained in the ambience causes the ambience carry extra warmth. yet what's causing water vapor to improve contained in the ambience? Water vapor will improve as a results of warm temperature. Warming causes extra evaporation, extra water contained in the ambience. it truly is a comments to inspite of causes the preliminary warming. even as water vapor is a more suitable greenhouse gas than CO2 it really remains contained in the ambience for some days while CO2 remains contained in the ambience for hundreds of years. If the atmsophere were to sit back slightly, the quantity of water vapor will shrink in very few days and strengthen the cooling. in all likelihood, warming from CO2 causes extra water vapor which amplifies the warming. The water vapor comments improve the end results of CO2 by a minimum of 2x and as a lot as 4x even as the interaction with different feedbacks is considered. If global warming is a hoax, you should be very very alarmed because it means that one and all the nicely ideal scientists contained in the global are in a huge conspiracy hostile to all the human beings of the global. It potential there is no technology that we are able to have self assurance because all of academia and each of the publishers of technology journals are in on the conspiracy. It means that one and all technological progression is crashing to a end because the full clinical approach is a faux. The link lower than is to a paper that discusses the elements feedbacks to CO2 from the mag of the yankee Meteorological Society.

2016-12-01 19:40:50 · answer #3 · answered by rothberg 4 · 0 0

When you breathe out your breathe is moist because there is so much water in your body. It is similar with plants, when they breath/transpire it carries water droplets with it.

Clouds are colder than 100degrees, yet they are made of water vapor.

2007-01-04 02:42:52 · answer #4 · answered by Shanna J 4 · 0 0

water vaporize in any degrees, not just at 100 deg.

2007-01-03 23:43:30 · answer #5 · answered by saeed_kazemian 1 · 0 0

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