Horrible Chemistry Puns/etc

I apologize in advance, but I had to let it out somewhere. Punchlines are in white, below the questions.

Why did the priest pour the salt shaker into his water?

To grant it solvation!

Why did the Communists never win beauty contests?

Because heat is not a state function!

Alternately: Why are there so many stupid people in Communist bureaucracies?

Because density is a state function!

What takes an overall input of heat and work?

Your mother! (In bed!) (Zing!)

EDIT: Also! Woo! Post 400!