Could entropy remain the same overall?

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SUMMARY

The discussion centers on the concept of entropy in the universe, referencing Roger Penrose's book "Cycles of Time." It asserts that an increase in entropy in one region does not result in a decrease in another, contradicting the idea that the universe's expansion serves to maintain a constant entropy level. The conversation also touches on the cyclical nature of the universe, suggesting that despite the presence of stars, entropy remains unchanged throughout these cycles.

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  • Understanding of thermodynamics and the second law of thermodynamics
  • Familiarity with cosmological concepts such as the universe's expansion
  • Knowledge of Roger Penrose's theories, particularly from "Cycles of Time"
  • Basic grasp of entropy and its implications in physical systems
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  • Research the second law of thermodynamics and its implications for entropy
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Physicists, cosmologists, and anyone interested in the fundamental principles of thermodynamics and the nature of the universe's entropy.

DarkStar42
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I have read a bit from the book Cycles of Time(Penrose), and I wondered whether an increase in entropy in one part of the Universe, lead to a decrease in entropy in other parts, and maybe the universe's expansion is an attempt by the Universe to keep entropy at the same level.
And eventually you get another big bang...I like to think of this process, in the context of the Universe being a 3-sphere, or 3-torus, or some such...ie finite at anyone time, but boundless.

So even with stars shining in one universe, you might get many cycles, all the while entropy staying the same.

I hope this isn't too non-mainstream..?
 
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DarkStar42 said:
and I wondered whether an increase in entropy in one part of the Universe, lead to a decrease in entropy in other parts
It doesn't.
DarkStar42 said:
and maybe the universe's expansion is an attempt by the Universe to keep entropy at the same level.
I don't see how you got that impression. No.
 

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