Chapter 2, Problem 39P

Hydrogen fluoride has a dipole moment of 1.83 D; its boiling point is $19.34°\text{C}$. Ethyl fluoride $\left({\text{CH}}_{\text{3}}{\text{CH}}_{\text{2}}\text{F}\right)$ has an almost identical dipole moment and has a larger molecular weight, yet its boiling point is $-37.7°\text{C}$. Explain.