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Statistical mechanics and macrostates

  1. May 6, 2005 #1
    In my Statistical Physics and Entropy module, we did something about atoms in a box with an imaginary partition down the middle, so atoms could either be on the left or the right. If there were 4 atoms in the box, the system would have 5 macrostates. If there were 8, there would be 9.

    Is is true that for n atoms in such a box, there are n + 1 macrostates, for any n?

    Thanks.
     
  2. jcsd
  3. May 6, 2005 #2

    dextercioby

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    Wrt what statistics...?If those atoms are identical,then u'd have 3 possible cases:Maxwell-Boltzmann statistics,Fermi-Dirac and Bose-Einstein.

    If they're not identical,then it wouldn't matter what classical/quantum description u adopt...

    Either way,a macrostate would be described through a n-tuplet (1,2,...,n) for distinguishable particles or (1,1,...,1) for indistinguishable particles.

    Daniel.
     
  4. May 6, 2005 #3

    Galileo

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    If your macrostate is defined as the number of atoms in the left side of the box, then yes, since you can have 0,1,2,..., or n atoms on the left.
     
  5. May 7, 2005 #4
    As usual, I have no idea what you mean.

    Thanks.
     
  6. May 7, 2005 #5

    dextercioby

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    If those 4 particles are photons,how many macrostates do you have there...?

    Daniel.
     
  7. May 7, 2005 #6
    :confused:
     
  8. May 7, 2005 #7

    dextercioby

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    It was the easiest example to what i'd been trying to tell...It matters what kind of particles you have there...It's not the same thing if they're billiard balls,fermions or bosons...:wink:

    Daniel.
     
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