like i said the radiation is shot out of the black hole(usually out of the axis on both sides i think) into space thats where all the mass and energy goes, into space. thats why they think the miniature black holes in the particle collider will disapear it only has to get rid of a couple protons mass in radiation, whereas actual black holes have to get rid of whole stars which takes a very long time.
Yes, you're basically right about this, the phenomenon is called, as others have pointed out, "Hawking Radiation" as it was originally predicted by Stephen Hawking back in the 70s. It basically describes how a black hole "disintegrates" over time, as its mass gradually is gradually re-emitted as thermal radiation by the black hole. Where does the energy go? The best anyone can tell is that it radiates outward just like a star radiates light radially outward into free space. (It's interesting to note that the smaller the black hole, the faster the rate at which it disintegrates; the reason for which this happens is not entirely understood, as Hawking Radiation has yet to be physically observed. And as kevin pointed out, while it is possible for high energy particle colliders like the LHC to produce tiny black holes, they would certainly disintegrate before it has a chance to grow at all; again the reason for this is two-fold, it has an exponentially higher rate of radiation than cosmic-scale black holes, AND there is a LOT less mass to convert into radiation.)
Where does the expanded universe expand into? No one really has any idea and I'm not sure that we will ever know to sure. Personally I don't think humans have the ability to comprehend anything it WOULD expand into, since it's can't be three dimensional space, but something entirely different. It's the same problem we hit when we wonder "What happened before the big bang?" We might be able to theorize about it, but any current or foreseeable technology wouldn't allow us to actually SEE beyond our own existence.
As far as the universe being infinite or finite...I think Daguin makes a excellent point when he said that words are meaningless constructs humans love assigning to things and phenomenon
... That being said, if you subscribe to any of the "Multiverse" theories, such as the many worlds interpretation of quantum mechanics, there would be an infinite number of "realities". Each of these are only separated by a single quantum discrepancy, encompassing every possible quantum state. (Of course it's fun to think that, if this interpretation is true, there is a universe out there with literally any set of conditions you could imagine! Sometimes I'd like it to be true just for that aspect
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Is our own "bubble" universe infinite? Well...I suppose at any given instance it has a finite dimension...but since it's constantly in a state of accelerated expansion, then it would be expanding into infinity. Another thing to consider is, like the many worlds theory, it's always been theorized that our own "bubble" is MUCH larger than we think, so much so that conditions begin to repeat themselves, leading to potentially more instances of our own world, or ones incredibly similar to it, all within our same universe! But the likelihood of us coming in contact with these worlds so similar to our own (or any intelligent life IMHO) is impossibly slim.
