Absolutely nothing limits the temperature of steam in
air. It can easily be superheated to thousands of degrees F.
However, at the water/steam interface, the steam will be
exactly 100C at standard pressure as it vaporizes. Even if the
water is full of dissolved matter, and has a slightly higher
boiling point.
When I calibrate thermometers, I always use well stirred ice
water, and well stirred boiling water. I can't see getting
enough dissolved matter in distilled water to make enough of
a difference in the boiling point to matter to me.
-Chuck Harris
Attila Kinali wrote:
On Mon, 21 Jul 2014 18:00:59 -0400
Chuck Harris <[email protected]> wrote:
Steam superheats only if the pressure is raised above standard pressure,
otherwise, steam at standard pressure will be exactly 212F, or 100C.
Uhm.. you are the second one claiming this. Could you please explain
what physics limits the temperature of vapor?
The ideal gas equation says that p*V/T = const, ie that the temperature
can rise at a constant pressure, as long as the gas is allowed to expand.
Attila Kinali
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