Does gravity defy the 2nd Law?

Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
33 replies · 4K views
Perhaps an image is worth more than 100 words. This is my intuitive picture

Gravity and 2nd Law.JPG
 
  • Like
Likes   Reactions: Demystifier and vanhees71
Physics news on Phys.org
Gerinski said:
I never stated that the cloud of gas could or could not radiate, that came only in some of the answers such as Anorlunda's.
You are the one who put it in the container, from which it can't radiate.
Personally, even now I do not see why such a gravitationally coalescing cloud of gas could not radiate to its immediate environment in the rest of the container.
What "rest of the container? Isn't it filled completely with a gas?

How does your scenario apply to the real universe? Why are we even talking about it? What game are we playing here?
 
Last edited:
Gerinski said:
I never stated that the cloud of gas could or could not radiate
Gerinski said:
Because of the impossibility to radiate

In general, if you are going to do that, it's best to do it somewhere where your previous messages are not stored.

And I'm done here.
 
  • Like
Likes   Reactions: russ_watters and berkeman
The answer was given by @Demystifier in post #6: the wrong assumption is that entropy has been reduced.

Time to close the thread. Thanks to all that participated.
 
  • Like
Likes   Reactions: russ_watters, PeroK and Demystifier