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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.

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15y ago
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13y ago

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.

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11y ago

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

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11y ago

HCl has a higher boiling point.

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12y ago

HCl has a lower boiling point than HBr.

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Q: Which molecule has a higher boiling point Cl2 or Br2?
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