Okay its nippy outside right now but have a look at this. A pan of boiling water turns instantly to snow in -21 degrees (-51 wind chill). Now that is proper bloody chilly. [video=youtube;QCrrJs2areo]http://www.youtube.com/watch?feature=player_detailpage&v=QCrrJs2areo[/video]
if you done the same with normal water it wouldnt happen,its a scientific thing cant remember what its called
nippy? bunch of tarts. I'm still cycling to work in shorts and a t-shirt... although to be honest, i'm still waiting for the real winter to turn up. sick to death of this grey, murky, rainy crap for the past month and temps hovering around a measly 2 or 3 degrees. give me -10 and snow and i'm happy.
dozens of peeps scalding themselves http://www.latimes.com/nation/nationnow/la-na-nn-boiling-snow-20140107,0,6070776.story#axzz2ppGGQr7J
Water at, or close, to its boiling point is at the point of changing state - liquid to vapor, also known as its "bubble point". The surface area of the fluid as it changes state is vastly increased (circa 1000 times greater at atmospheric pressure), and heat transfer (loss to the atmosphere in this case) causes the reverse change of state to happen - it goes from a vapour to a liquid. The difference this time is it then quickly gives up sufficient heat energy to move from the liquid state into a solid (ice). When the first crystals of ice form this causes nucleation points in the vapour to quickly spread causing an increase in nucleation points - eg the ice crystals quickly spread. The amount of energy given out to the atmosphere is called an exothermic transfer, and the energy is called latent heat of fusion. The same amount of heat energy must be transferred endothermic ally to the ice in order to reverse the phase change from ice to liquid water. All that said, it's just a bunch of Septics lobbing boiling water around. KtF
