Question

Rationalize the difference in boiling points between the members of the following pairs of substances. Part A: HF (20 °C) and HCl (-85 °C) HF has the higher boiling point because HF molecules are more polar. HF has the higher boiling point because hydrogen bonding is weaker than dipole-dipole forces. HF has the higher boiling point because hydrogen bonding is stronger than dipole-dipole forces. HF has the higher boiling point because of ionic bonding. HF has a much higher boiling point than HCl, indicating that it contains strong intermolecular forces. Specifically, it contains hydrogen bonding, which is a stronger force than dipole-dipole forces. Part B: CHCl3 (61 °C) and CHBr3 (150 °C) CHCl3 has the higher boiling point because CHCl3 molecules are more polar. CHCl3 has the higher boiling point because of stronger dipole-dipole forces. CHCl3 has the higher boiling point because of weaker dipole-dipole forces. CHCl3 has the higher boiling point because of ionic bonding. CHBr3 has a higher boiling point than CHCl3. This is because CHBr3 molecules are more polar than CHCl3 molecules, resulting in stronger dipole-dipole forces.

          Rationalize the difference in boiling points between the members of the following pairs of substances.

Part A: HF (20 °C) and HCl (-85 °C)

HF has the higher boiling point because HF molecules are more polar. HF has the higher boiling point because hydrogen bonding is weaker than dipole-dipole forces. HF has the higher boiling point because hydrogen bonding is stronger than dipole-dipole forces. HF has the higher boiling point because of ionic bonding.

HF has a much higher boiling point than HCl, indicating that it contains strong intermolecular forces. Specifically, it contains hydrogen bonding, which is a stronger force than dipole-dipole forces.

Part B: CHCl3 (61 °C) and CHBr3 (150 °C)

CHCl3 has the higher boiling point because CHCl3 molecules are more polar. CHCl3 has the higher boiling point because of stronger dipole-dipole forces. CHCl3 has the higher boiling point because of weaker dipole-dipole forces. CHCl3 has the higher boiling point because of ionic bonding.

CHBr3 has a higher boiling point than CHCl3. This is because CHBr3 molecules are more polar than CHCl3 molecules, resulting in stronger dipole-dipole forces.

Added by Benjamin A.

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