Answer to Question #319206 in General Chemistry for Emman

Question

The boiling points of the hydrides of halogens are given below.

Compound HF HCl HBr HI

Boiling point (℃) 293 188 206 238

Discuss the variation in these boiling points in terms of intermolecular forces of attraction.

__________________________________________________________________________________________________________________________________________________________________________________________________________________

Identify the polarity of HF, HCl, HBr, HI

Answer 1

There is strong hydrogen bonding between HF molecules. The bond energy of HF molecules is greater than in other hydrogen halides.From HCl to HI the boiling point rises. This trend is attributed to the increasing strength of intermolecular van der Waals forces, which correlates with numbers of electrons in the molecules.