Chemistry, 20.12.2020 18:00 payshencec21

Why does hydrogen iodide (HI) have a higher boiling point than hydrogen bromide (HBr)? [Atomic numbers: bromine = 35; iodine = 53]

A the iodide ions in HI are larger than the bromide ions in HBr.
B The H-I covalent bond is stronger than the H-Br covalent bond.
C There are hydrogen bonds between HI molecules but not between HBr molecules.
D The permanent dipole-permanent dipole forces between HI molecules are stronger than
those between HBr molecules.
E The induced dipole-induced dipole (dispersion) forces between HI molecules are stronger
than those between HBr molecules.

Can someone pls help :) the answer is E, but I don’t know why.

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