Chapter 11 - Sections 11.1-11.13 - Exercises - Problems by Topic - Page 536: 54

H$_2$S $\lt$ H$_2$Se $\lt$ H$_2$O

All the molecules are polar. H2S and H2Se only have dipole-dipole, while H$_2$O has hydrogen bonds. H$_2$S is smaller than H$_2$Se, and is therefore the weakest. Boiling point is directly correlated to IMF strength.