Ron Henderson on
Fri, 10 Jun 2016 19:18:01 +0000 typed in rec.crafts.metalworking the
following:
replying to Jon Danniken, Ron Henderson wrote:
It is impossible to heat water above it's boiling point. At that point it
becomes steam. Only the steam can be heated above 212°F.

Actually, you're half correct. You cannot heat water above the
boiling point. But the boiling point of any material is also subject
to the pressure upon it. Carbon dioxide goes from solid to gas in
atmosphere, because its boiling point at that pressure is below the
melting point.
If you want to heat water above the boiling point, you just have
to be able to contain the pressure. The Steam Institute has a booklet
with tables, that as temp goes up, pressure goes up, until the
critical point, after which there is apparently no difference between
liquid water and gaseous water.

"In water, the critical point occurs at around 647 K (374 °C) and
22.064 MPa (218 atm). As the substance approaches critical
temperature, the properties of its gas and liquid phases converge,
resulting in only one phase at the critical point: a homogeneous
supercritical fluid."

tschus
pyotr


--
pyotr filipivich
"With Age comes Wisdom. Although more often, Age travels alone."