I didn't make an effort to identify exactly which water molecules are loosing
energy in the process. The end result is the same; the water left behind is
cooler and less energetic than it was before the vaporization occurs.
What process do you consider active leading to the vapor escape with the nano
material device? Perhaps you are thinking that a tiny packet of steam
escapes the surface in a manner somewhat like boiling water and that would have
interesting implications as well. Regardless of how the liquid water ends up
as a vapor I expect it to take the same net energy to reach the same end state.
Where the required energy comes from should be capable of discovery.
Dave
-----Original Message-----
From: Sunil Shah <s.u.n....@hotmail.com>
To: vortex-l <vortex-l@eskimo.com>
Sent: Thu, Jan 23, 2014 3:09 am
Subject: RE: [Vo]:Nanoparticles make steam without bring water to a boil.
Dave says:
> When ice sublimes, or water evaporates, a similar process may be taking
> place. Heat is extracted from the water remaining during vaporization so
> that a net cooling of the remaining water takes place. If I recall, wind
> blowing over a wet leaky bag is used for cooling in some locals. Vapor
> sprays can be used in a similar fashion.
No, it's not a similar process. Macro "temperature" is a statistical effect
(an average of molecular energies). The molecules leaving water as it
evaporates are those with highest energy (they escape easiest). This also
accounts for the lowering temperature effect of evaporating fluids. Yes, in
some countries when the weather is (very) hot, people hang damp cloth in the
windows to lower the air temperature.
/Sunil
