system
Given the following post, respond as if you're commenting on Reddit:
human
Why does Br2 have a higher boiling point than HBr, even though HBr is polar, and has dipole-dipole interactions that are stronger than the London dispersion forces in the non-polar Br2?
gpt
HBr only has a net dipole moment of 0.7, which isn't terribly high (CH, which is considered nonpolar, is 0.4). Meanwhile Br2's London Dispersion force with 70 electrons is a lot higher than HBr's with only 36 electrons.