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Wasn't the universe more disordered in the past?

  1. Oct 5, 2011 #1
    If the universe was hotter in the past, it was more chaotic and disordered with all the molecules and particles colliding with eachother. How does this correspond to the second law of thermodynamics where things are supposed to get more chaotic as the time moves on, not backwards?
     
    Last edited: Oct 5, 2011
  2. jcsd
  3. Oct 5, 2011 #2

    Vanadium 50

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    T and S are different quantities. Can you calculate dS/dt and show it is negative?
     
  4. Oct 5, 2011 #3
    Yeah, mathematically what your saying makes sense. However, I don't understand it conceptually. Entropy is supposed to mean disorder and chaos. The future of the universe going to end with a whimper, not a bang. Its going to be anything but chaotic with the temperature becoming absolute zero.
     
  5. Oct 5, 2011 #4

    Vanadium 50

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    You are confusing temperature with entropy.
     
  6. Oct 5, 2011 #5
    First, the universe will never reach absolute zero, that violates the Uncertainty Principle. Second, at the early stages, the universe was far more uniform than it is today and will be in the future. At the beginning, it was so hot that even all of the forces were identical.
     
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