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Explain why the boiling point of hydrogen bromide lies between those of hydrogen chlo

Explain why the boiling point of hydrogen bromide lies between those of hydrogen chloride and hydrogen iodide

FIRST i thought polar-molecules but they all are, then I thought electronegativity but that would contradict the boiling points

so..
I said because Bromide is a smaller molecule than iodide therefore less electrons and weaker van de Waals forces on the other hand it is a larger molecule than chloride atom therefore more electrons and stronger van der waals forces.

correct?

Reply 1

PowerPuff

So it was right to talk about van de Waals?
I knew it!

Reply 2

PowerPuff

Explain why the boiling points of HBr is lower than HI but higher than HCL?

:confused:

Reply 3

Muattaz.Kazzam

HI is a larger molecule (has more electrons) than HBr and therefore has more/stronger forces of van der waals so more energy is required to break these bonds thats why it has a higher boiling point. Opposite reasoning for HCl.