On Wednesday 19 June 2013 15:01, Larry Barron wrote:
> OK, But what if the watter if frozen (like in the cold of space) and the
> glass is designes to hold the pressure of the expanding watter/gas (NOTE
> ITS NOT AIR! Only oxygen & hydrogen as AIR is MOSTLY nitrogen) as in a dead
> space ship?
Presuming that the glass and the ice are sufficiently strong to withstand the
pressure difference and that the shape of the glass will prevent the ice from
sliding further into the glass:
It depends on the temperature.
If the temperature is low enough that the ice will not melt then some of the
ice will sublimate into the vacuum, soon reaching an equilibrium. Eventually
the process of sublimation from the atmospheric side will result in the ice
suffering a structural failure.
If it is warm enough for the ice to melt then the ice plug will slowly slip
down into the glass as the edges melt. Vapor in the lower cavity will
condense out as the volume is reduced as the pressure goes above the vapor
pressure.
--
Chakat Firepaw - Inventor & Scientist (Mad)
Received on Thu Jun 20 2013 - 15:23:59 CDT