Why is $n-C_10 H_22$ boiling point higher than $Br_2$ boiling point?

Question

$Br_2$ has bigger relative mass than $n-C_10 H_22$ , and both are linear molecules. However, it has lower boiling point than $n-C_10 H_22$ .

What is the cause of such situation?

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Answer 1 · 2017-11-16T23:53:30

Decane has a very slight dipole, whereas bromine has no dipole. Carbon and hydrogen have approximately a $0.35$ difference in electronegativity.

This is a demonstration of how negligible dispersion forces are when there are also dipole-dipole interactions.

There may be other reasons, which I'm open to hearing!