Fri 8 Mar, 2013 06:56 am - Hi,
Is it possible to express, say, the difference between 2.7 deg K and 0.25 deg K as a pressure difference i.e. in bars, millibars, femtobars etc?
I'm thinking of a void between one... (view)
Fri 28 Dec, 2012 01:15 am - Ok thanks. Specifically, I read that liquid Helium does not freeze at temps close to Absolute Zero unless under 25 atmospheres and thought - odd. Why raise the pressure to get it to freeze?
Thu 27 Dec, 2012 01:57 am - Yes I guess I'm confusing things by referring to Boyles Law. Let's forget that law for this question, sorry.
I'll try to rephrase:
If liquid Helium needs a pressure of 25... (view)
Wed 26 Dec, 2012 12:24 am - Liquid Helium requires 25 atmospheres of pressure to freeze solid at very low temperatures. Solids have less molecular energy than liquids so why would introducing energy to the system (in the form... (view)
Sat 22 Dec, 2012 07:08 am - I have read recently that liquid helium will not freeze at 1 atmosphere of pressure, but will at 25 atmospheres.
How would this not contradict Boyles Law that pressure and temperature are directly... (view)