0 Members and 2 Guests are viewing this topic.
The specific latent heat is the amount of energy required to convert 1 kg (or 1 lb) of a substance from solid to liquid (or vice-versa) without a change in the temperature of the surroundings -- all absorbed energy goes into the phase change -- is known as the specific latent heat of fusion.
Ewe see..I thought when stuff happens..energy is made and released as heat yes ?...so...how come when water changes to ice it freezes ?...does this process not generate heat ?
Kewl !!...so , remove the heat and ewe have ice !..when the actual water turns to ice..does that not itself just generate a little heat when it goes from liquid to solid ! ?
Quote from: neilep on 04/01/2010 20:14:09Kewl !!...so , remove the heat and ewe have ice !..when the actual water turns to ice..does that not itself just generate a little heat when it goes from liquid to solid ! ?It should do it.Suppose you have liquid water at -10°C (it's not a paradox, you can create it with specific expedients); it's in a non-equilibrium state and it can solidify suddenly(*). Then the latent heat of fusion have to be released and the ice have to become hotter, so the temperature goes, let's say, from -10°C to -5°C.(*)as in these experiments:http://www.break.com/usercontent/2007/8/super-cooling-experiment-350713
Just for the recotrd, once you get the supercooled water to freeze it is a mixture of ice and water so its temperature is exactly 0C.
The temperature won't rise to -5 C it will rise to exactly 0C when the stuff freezes.