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Does it have to do with internal energy or entropy or enthalpy?

2007-01-05 06:11:48 · 8 answers · asked by Hamfrey W 1 in Science & Mathematics Physics

8 answers

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2007-01-05 06:15:06 · answer #1 · answered by god knows and sees else Yahoo 6 · 0 1

This is a really good question.

Although water boils at 100 deg C at standard atmospheric pressure, it can boil at quite different temperatures at different pressures. For example, in the mountains, one generally needs to boil food longer than "normal" because the water is boiling at something less than 100 deg C. Your three-minute egg might be a four-minute egg in the mountains, for example.

So long as water has temperature its molecules are moving. Even in its ice state, water molecules are vibrating around the same general location wherein they were gelled.

Anyway, vibrating or moving water molecules (enthalpy energy) occasionally break free at the surface and pop into the atmosphere. Thus, you have water vapor even though the water temperature is below boiling...even frozen.

As you might imagine, the closer the water gets to boiling temperature, the more molecules break the surface and pop into the surrounding air. They gain more enthalpic energy with higher temperatures. That's one reason we associate humid air with hot air, the molecules are really churning; so they are more able pull away from the pond to mix into the atmosphere.

Good question.

2007-01-05 06:28:13 · answer #2 · answered by oldprof 7 · 0 0

this is by technique of the fact boiling and evaporation are completely 2 distinctive techniques. Evaporation is a floor phenomenon. particular molecules of water(or any liquid) tend to have larger kinetic potential than the others. if so those molecules can go away the exterior of the liquid nicely in the previous it reaches its boiling factor. those molecules use the latent warmth from the exterior they are touching and subsequently evaporate nicely in the previous they attain their boiling factor. it is likewise between the biggest clarification why evaporation motives cooling( with the aid of fact it makes use of the latent warmth from the exterior it somewhat is touching. So the exterior loses warmth and that motives cooling(in basic terms for added information.)) desire this helps you:)

2016-11-26 21:51:23 · answer #3 · answered by Anonymous · 0 0

there is a diffrence between the temperature and thermal energy, to evaporate, water, needs to acquire thermal energy (measured in calories) regardless of the environment temperature.
but boiling is a whole different matter, it only occurs at a fixed temperature for a given atmosheric pressure

2007-01-05 06:22:37 · answer #4 · answered by Dr. WAR 2 · 0 0

actually at any boundary between states there is atoms going in both directions......and of course you must remember that more is involved with boiling point than just temperature.....hence the high altitude directions for cooking.....boiling point of water stated as 100C is for atmospheric pressure at sea level.....

2007-01-05 06:18:44 · answer #5 · answered by billcomstock1971 1 · 0 0

I was drinking some room temperature water just the other day and didn't seem to notice it vaporizing. I don't think you are asking the question you mean to be asking!!

2007-01-05 06:14:46 · answer #6 · answered by TopherM 3 · 1 1

Evaporation.

2007-01-05 06:13:33 · answer #7 · answered by Anonymous · 0 0

its simple baby be cause of the wind (if the amount of water is not much) or its ......... ahhhhhhh

2007-01-05 06:14:10 · answer #8 · answered by Raoof 2 · 0 1

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