The normal boiling point for HBr is higher than the normal boiling point for HCl.This can be explained by
A)larger dipole-dipole forces for HBr.
B)larger dispersion forces for HBr.
C)larger hydrogen-bond forces for HBr.
D)larger dipole-dipole forces,larger dispersion forces,and larger hydrogen-bond forces for HBr.

Question

Quizplus · Accepted Answer

HBr has a higher molecular weight than HCl, leading to larger dispersion forces, which increases its boiling point. Hydrogen bonding is not significant in either molecule due to the lack of a strongly electronegative atom bonded to hydrogen capable of hydrogen bonding, and while both have dipole-dipole interactions due to their polar bonds, the key difference in boiling points is attributed to the dispersion forces.

The Normal Boiling Point for HBr Is Higher Than the Normal