# Which type of bonding accounts for the relatively high boiling point of H_2O as compared with the relatively low boiling point of H_2S?

Hydrogen sulfide has some (little) degree of hydrogen bonding, but sulfur is much less electronegative than oxygen, and hence its boiling point should be comparatively low. You should look up the boiling points of ${H}_{2} O$, ${H}_{2} S$, ${H}_{2} S e$, ${H}_{2} T e$. (Note that hydrogen sulfide smells pretty bad; hydrogen selenide and hydrogen telluride smell like dead dogs - they are also much more poisonous.)