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Does not receeding of galaxies decrease entropy!

  1. Apr 14, 2012 #1


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    First there arose a interesting question of how entropy increases when particles due to gravitation form huge mass.
    I guess i read john baez's online page. Heat/energy so forth concept was applied to explain it.
    Then, Taking its reverse, does not receeding of galaxies then decrease entropy if the same concept as above is applied?
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  3. Apr 14, 2012 #2


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    If you place a piece of dry ice into a deflated ballon, it will evaporate and its molecules will press against the skin of the balloon causing it to inflate. The average distance between molecules will increase as the volume of the balloon increases. Does this represent a decrease in entropy from the original state [dry ice in the deflated balloon] of the system?
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