1. A bonus question on a university exam asked whether Hell is exothermic (gives off heat) or endothermic (absorbs heat). 2. Most students used Boyle's law to argue that Hell gives off heat as souls enter and expand the volume. 3. However, one student calculated that souls are continuously entering Hell but not leaving, so Hell's volume must increase to maintain temperature and pressure. 4. If Hell expands slower than the rate of new souls, the temperature will rise, but if faster, it will freeze - and since the student has yet to succeed with Teresa, option 2 cannot be true, so Hell must be exothermic.