Question

Consider the molecules HCl, HBr, HF, and HI. Which would you expect to have the highest boiling point and why

A) HBr because it has the highest mass and the most electrons
B) HCl, because it experiences hydrogen bonding
C) HF, because it has the strongest intermolecular force
D) HI, because it experiences ion dipole forces

Answer 1

C

Step-by-step explanation:

Answer 2

C) HF, because it has the strongest intermolecular force

Step-by-step explanation:

The electronegativity difference ΔEN between H and F is so high that HF has especially high dipole-dipole forces, which we call hydrogen bonds. They are the strongest intermolecular forces, and they are responsible for the high boiling point of HF.

A) is wrong. HI has a higher mass and more electrons than HBr.

B) is wrong. There is no hydrogen bonding in HCl.

D) is wrong. There are no ion-dipole forces in HI.