The Physics of Hell

A true story. A thermodynamics professor had written a take home exam for
his graduate students. It had one question:

Is hell exothermic or endothermic? Support your answer with a proof.

Most of the students wrote proofs of their beliefs using Boyle's Law or
some variant. One student, however wrote the following:

     First, we postulate that if souls exist, then they must have some
mass. If they do, then a mole of souls can also have a mass. So, at what
rate are souls moving into hell and at what rate are souls leaving?

     I think that we can safely assume that once a soul gets to hell, it
will not leave. Therefore, no souls are leaving.

     As for souls entering hell, lets look at the different religions that
exist in the world today. Some of these religions state that if
you are not a member of their religion, you will go to hell. Since,
there are more than one of these religions and people do not belong to
more than one religion, we can project that all people and all souls
go to hell.

     With birth and death rates as they are, we can expect the number of
souls in hell to increase exponentially.

     Now, we look at the rate of change in volume in hell.  Boyle's Law
states that in order for the temperature and pressure in hell to stay the
same, the ratio of the mass of souls and volume needs to stay constant.

     So, if hell is expanding at a slower rate than the rate at which souls
 enter hell, then the temperature and pressure in hell will increase until
all hell breaks loose.

     Of course, if hell is expanding at a rate faster than the increase of
souls in hell, than the temperature and pressure will drop until hell
freezes over.

The student got an A on the exam.

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