Interpretation: To choose the molecule having the higher boiling point and to give a brief account for the intermolecular forces that influenced the boiling point of the corresponding molecule.
Concept Introduction:
The set of repulsive and attractive force between molecules that result from the polarity between neighboring molecules is represented as intermolecular force. There are four types of intermolecular forces:
- Hydrogen bonding
- London dispersion force
- Ion – dipole force
- Dipole – Dipole force
Ion – dipole force is a strong intermolecular force as it contains both ionic and polar bonds.
Hydrogen bond: Hydrogen is bonded to strong electronegative atom like oxygen, nitrogen etc.
Dipole – Dipole: This force takes place between two polar compounds.
London dispersion force: This force is present in all compounds and is a weak force.
As the molecular mass increases the energy required to get over the intermolecular forces increases
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Chemistry: Atoms First
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