"Martin Eastburn" wrote in message
...
STP - Standard Temperature and Pressure. Jack with pressure and the
temperature specs change.

Take the pressure off water e.g. vacuum and you can boil it.
In the reverse pressure up the water and it can't boil. e.g. no
steam.
Release the pressure and zap, almost instant 100% steam. Sometimes
dangerously.
Martin

This is a practical application of the energy stored in hot water
under pressu
https://en.wikipedia.org/wiki/Fireless_locomotive

--jsw