“Is Hell exothermic (gives off heat) or endothermic (absorbs heat)?”
I saw an article debating this question recently. Apparently it was an extra credit question on a science exam. You can see the original article Here. The student goes on to make his arguments from a scientific point of view. However the flaw of the article is that the question is in itself invalid since Hell is a spiritual phenomenon not a place which can be (even in jest) scientifically studied.
I, for my own insignificant sake, would like to put my brief 2 cents out there. Not that anyone really cares what I think.
Hell is neither exothermic or endothermic. Hell is a spiritual state one chooses as a result of their moral decisions and actions here on earth and into which the soul enters after death. The fires of Hell are symbolic or even metaphorical. The spiritual torment (hell) is derived by the soul's encounter with the being we refer to as God. Self deception is stripped away, the eyelids of the soul are removed. One can no longer turn away from Truth. The extent to which the Truth is intolerable to the individual soul dertermines how much "discomfort" the individual soul feels.
This certainly is a very simplified explanation of the issue and does not discuss the role the Christ plays in this dynamic. That is for another post. What I wanted to say for now, however, has been said.