Scene: With a patient in my medical exam room

Doc: How old are your kids?
Patient: Forty-four and 39 from my wife who passed away, and from my second wife, 15 and 13.
Doc: That’s quite the age difference!
Patient: Well, the older ones didn’t give me any grand kids, so I made my own.

The following is a question given on University of Arizona 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 and heats when it is compressed) or some variant.