Boiling points increase in the order HCl

Question

Boiling points increase in the order HCl < HBr < HI because ________ contribute to the intermolecular interactions.
A)dispersion forces
B)dipole-dipole forces
C)ion-ion forces
D)ion-dipole forces
E)hydrogen-bonding forces

Quizplus · Accepted Answer

Dispersion forces increase with the size and mass of the molecules. HCl, HBr, and HI are all nonpolar molecules, so their intermolecular interactions are primarily due to dispersion forces. As the size and mass increase from HCl to HI, the dispersion forces become stronger, leading to higher boiling points.

Boiling Points Increase in the Order HCl < HBr