Which molecule has a higher boiling point Cl2 or Br2?

Answer 1

HCL has a higher boiling point compared to HBr

This is due to difference in electronegativity.

H - 2.1

Cl - 3.0

Br - 2.8

The difference for HCl is 0.9, the difference for HBr is 0.7.

The larger the difference in electronegavity means the stronger the bond. Large difference means greater attraction hence more energy is needed to overcome this bond.

Answer 2

HBr and HCl are both polar have similar dipole-dipople forces. This can be determined by looking at their electronegativities.

Now, you need to determine their London Dispersion Forces- HBr is bigger than HCl (it is lower on the Periodic Table), so it has much more dispersion force.

Answer 3

Br2 has a higher boiling point than Cl2 because bromine is a larger atom than chlorine, leading to stronger van der Waals forces between the Br2 molecules.

Answer 4

Br2 because it is a larger atom than Cl making the Intermolecular forces larger for Br2.

Answer 5

HCl has a higher boiling point.

Answer 6

HCl has a lower boiling point than HBr.