Wow, thanks
stingc for the posts. Very informative.
Just one question, which I am still a bit unclear about
:
Would a Big Crunch break the second law?
Ignore the fact that, at the moment, it appears a Big Crunch will not actually happen...if it did, would it go against the second law?
Surely if the universe was to contract, its density would cause the creation of black holes, and then these black holes would merge to form bigger black holes, until eventually we were left with nothing but one "huge" black hole, being the final singularity of the universe. Since you said that black holes are very high entropy, then it would not break the second law.
But what fundamental difference is there to a huge black hole singularity, and the big bang singularity?
Am I completely misguided in comparing the two?