1)
(CH3)3N Won't; you need a hydrogen adjacent to an electronegative atom (N or O, generally) to hydrogen bond (more or less)
2)
SiH4 (Silane); silane undergoes stronger van der Waals forces than methane
3)
CH3NH2; the NH2 portion is both more electronegative (thus allowing for dipole-dipole interactions) and a capable hydrogen bond donor and acceptor (see #1)
4)
a) True; it takes a lot of energy to turn liquid water into steam, or a solid into a liquid
True; they bond relatively regularly with their immediate neighbors but there is no overarching 3D structure
c) True; it's important to note that there's no temperature change--this is actually the energy talked about in the first true/false (one of them, at least)
d) False (I THINK!!!); I believe after you reach the critical point, you enter into a weird supercritical fluid point. Don't trust me on this 100%, thermodynamic buzzwords aren't my specialty