Many of us have seen this before, but i still find it funny no matter how many times i read it:

Hell explained by Chemistry Student:

The following is an actual question given on a University of Washington chemistry mid-term. The answer by one student was so "profound" that the professor shared it with colleagues, via the Internet, which is, of course, why we now have the pleasure of enjoying it as well:
Bonus Question: Is Hell exothermic (gives off heat) or endothermic
absorbs heat)?

Most of the students wrote proofs of their beliefs using Boyle's Law
(gas cools when it expands & 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 &
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 Hell, 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 & since people do not belong to more than one religion, we can project that all souls go to Hell.

With birth & 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 & pressure in Hell to stay the same, the volume
of Hell has to expand proportionately as souls are added.
This gives 2 possibilities:

1. If Hell is expanding at a slower rate than the rate at which souls
enter Hell, then the temperature & 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 & pressure will drop until Hell freezes
over. So which is it?

If we accept the postulate given to me by Teresa during my Freshman
year that, "It will be a cold day in Hell before I sleep with you," &
take into account the fact that I slept with her last night, then
number 2 must be true, & thus I am sure that Hell is exothermic & 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 & is therefore, extinct.....leaving only Heaven, thereby proving the existence of a divine being which explains why, last night, Teresa
kept shouting "Oh my God."

THIS STUDENT RECEIVED THE ONLY "A".