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Homework Help: Absolute zero in a bottle

  1. Apr 5, 2008 #1
    1. The problem statement, all variables and given/known data
    ive been thinking about this for some time but cant find an answer...
    gas enters a bottle at a very low pressure, and high temperature, to maximise space between particles. the bottle is then sealed off and the temperture drops to absolute zero, does the gas become solid?

    2. Relevant equations

    3. The attempt at a solution

    confused, if the gas turns to solid there would be a massive vacum of space surounding it, and particles move from high pressure to low preesure. but at absolute zero particles dont move so a solid might in the first place be unabtainible
  2. jcsd
  3. Apr 5, 2008 #2
    The reason particles move from high to low pressure is because they aren't being hit by other particles as much in the low pressure area, and therefore are pushed towards it by the high pressure area particles. If there is no temperature, absolute zero, there is also no motion of the particles, so a particle won't be pushed into the vacuum.

    As for whether or not the gas will become a solid, I'm not entirely sure. I think that once they get very close to absolute zero they become a Bose-Einstein condensate.
    http://en.wikipedia.org/wiki/Bose_einstein_condensate" [Broken]
    Last edited by a moderator: May 3, 2017
  4. Apr 8, 2008 #3
    Absolute zero of course is defined as the temperature at which all molecular motion ceases. At this point the energy contained within the atom/molecule would be 0.00 E-999... . And with the gaseous state having the most energy (Except for plasma, which is a gas heated until the energy contained within excites electrons enough to cause them to be ejected from orbit around the nucleus) and liquid state being a step down in energy from a gas and solid state containing less energy than a liquid it seems to me the gas entering said bottle will change its state to a liquid. Even Hydrogen atoms have a melting point 0f 14.01 K would release enough energy during its phase change from gas to liquid and possibly liquid to solid (Though the freezing point is unknown, but is around 14.01 K) to raise the temperature above 0 K. Now in my personal opinion (Formed by my knowledge thus far) I do not believe 0 K can be obtained (0.1 E-999 K maybe, but not truly 0 K).

    To modern science we believe Einstein's relativity to be true and the law of the conservation of matter to be true. My theory is that if 0 K were achieved the energy contained within an atom or molecule would be converted into matter, which is "impossible" as of now. The other aspect is that we have yet to identify what energy "is" (Its composition and properties) and until then will always wonder about Absolute Zero and its effects.
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