Question
Define hydrogen bond. Is it weaker or stronger than the van der Waals forces?
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Answer
In polar molecules the partial positive hydrogen atom of molecule is attracted by partial negative element of other molecule. This attraction force is called H -bond. Example : HF and $H _2 O$.
Hence, hydrogen is the force of attraction that binds the H atom one-one molecule to the electronegative atom ( $F , O$ or N ) of other molecule. The H-bond is stronger than Van der Waals force because it is a strong dipole-dipole attraction whereas Van der Waals force is weak dispersion force or London force.
Hence, hydrogen is the force of attraction that binds the H atom one-one molecule to the electronegative atom ( $F , O$ or N ) of other molecule. The H-bond is stronger than Van der Waals force because it is a strong dipole-dipole attraction whereas Van der Waals force is weak dispersion force or London force.
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