Absolute Zero : What keeps Helium from becoming solid?

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Discussion Overview

The discussion centers around the phenomenon of helium remaining in a liquid state at absolute zero and the factors that prevent it from solidifying, particularly in relation to its superfluidity and the effects of pressure.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that helium's superfluidity may play a role in preventing it from solidifying at absolute zero.
  • Another participant questions whether solid helium is possible at any pressure, noting that at 1 atm, helium remains a liquid at 0K, unlike other substances.
  • A participant proposes that helium does not form molecular structures like hydrogen, leading to interactions primarily through Van der Waals forces, which may influence its state at low temperatures.
  • There is a consideration of zero point energy and its potential role in keeping helium from forming a solid structure at 1 atm, with a participant seeking confirmation of this idea.

Areas of Agreement / Disagreement

Participants express differing views on the conditions under which helium can solidify, with some suggesting it is impossible at any pressure while others indicate that it may solidify under certain conditions. The discussion remains unresolved regarding the exact mechanisms at play.

Contextual Notes

There are limitations regarding the assumptions about pressure and temperature conditions, as well as the role of zero point energy, which are not fully explored or defined in the discussion.

BigRedRod
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I'm guessing this most likely has something some to do with Helium's superfluidity, but I'm still managing to draw a blank on what exactly stops it solidifying.

Any thoughts?
 
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Absolute Zero : What keeps Helium from becoming solid?
At what pressure ?
 
I was under the impression that solid helium was just out of the question at any pressure. Although my own search has revealed otherwise and your question points out similar.

Lets say 1atm, everything is solid at 0K except Helium which is still merrily a liquid.

My thoughts are currently along the lines that He doesn't form molecules (like Hydrogen) so it is left to interact with other He particles only via Van der Waals forces. At 0k the atoms in the (now liquid) helium have no kinetic energy. No energy except for zero point energy.

Am I right in concluding that at 1atm, the zero point energy of helium gives it enough KE to avoid forming into a solid structure?
 
Cheers, I guess I Should have searched a bit harder before asking
 

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