I don’t usually post these, but I found this one particularly funny:

The following is an actual question given on a University of Liverpool
chemistry final exam. The answer by one student was so
“profound” that the professor shared it with colleagues via
the Internet, which is why we now have the pleasure of enjoying it as
well.

Question: Is Hell exothermic (gives off heat) or endothermic (absorbs heat)?

Most of the students wrote proofs of their beliefs using Boyle’s Law
that gas cools when it expands and heats when it is compressed or some
variant.

One student, however, wrote the following: First, we need to know how
the mass of Hell is changing in time. So we need to know the rate at
which souls are moving into Hell and the rate at which they are
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 how
many souls are entering well, let’s look at the different religions
that exist in the world today.

Most of these religions state that, if you are not a member of their
religion, you will go to Hell. Since there is more than one of these
religions and since people do not belong to more than one religion, we
can project that 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 of the volume in Hell. Because
Boyle’s Law states that in order for the temperature and pressure in
Hell to stay constant, the volume of Hell must expand proportionately
as souls are added. This gives two possibilities:

1. 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.

2. If Hell is expanding at a rate faster than the increase of souls in
Hell, then the temperature and pressure will drop until Hell freezes
over.

So which is it? If we accept the postulate given to me by Sandra
during my freshman year, that “it will be a cold day in Hell
before I sleep with you,” and take into account the fact that I
slept with her last night, then number 2 must be true, and thus I am
sure that Hell is endothermic and has already frozen over.

The corollary of this theory is that since Hell has frozen over, it
follows that it is not accepting any more souls and is
extinct…leaving only Heaven, thereby proving the existence of a
divine being – which explains why, last night, Sandra kept shouting
“Oh my God.”

THIS STUDENT RECEIVED THE ONLY “A”.