[TR] Interesting data on coolant

[Dave]

But, as Tony pointed out, in an open system there will be evaporation
and that evaporation will be H2O.  But to characterize it as boiling is
incorrect, as you point out.  Nor will it occur only at 212 deg.  It
will happen at any temperature below the boiling point of the solution,
it just gets faster as the temperature rises.

Dave



-----Original Message-----
From: McGaheyRx <McGaheyRx at aol.com>
To: spook01 <spook01 at comcast.net>; triumphs <triumphs at autox.team.net>
Sent: Mon, Mar 3, 2014 10:08 am
Subject: Re: [TR] Interesting data on coolant


Not to split hairs, but there is some down right misleading stuff in
the
explanation below.

When you mix antifreeze with water, you create a solution with an
elevated
boiling point. It is misleading to say that water still boils at 212f
because you are now dealing with a solution with an elevated boiling
point.

The glycol does NOT separate from water - it stays in solution - if the

solution starts to boil, the steam that evaporates first will be H2O,
but  its
misleading to call that a separation of glycol from water - the part
that
doesn't boil away remains a water/glycol solution - with an elevated
boiling
 point - which will be elevated even further under pressure.

Boiling point elevation and freezing point depression are basic
physical
principles with other applications - its the same principle used when
salt is
  applied to road surfaces to depress the freezing point of H2O on the
road
surface.
Its just silly to say that water still boils at 212f when mixed with
antifreeze in your radiator - its not pure water anymore, its an
aqueous
solution with an elevated boiling point.

Cheers,
Jack Mc
(i knew that major in chemistry would come in handy someday)