Question

water has a high boiling point for a substance of its molecular weight. account for this fact in terms of intermolecular forces​

Answer 1

Answer:

The high boiling point of water is due to intermolecular Hydrogen Bonding

Explanation:

H- Bonding :

It is special type of Dipole - dipole interaction.This is found in molecules which have high electronegative element attached to the electropositive Hydrogen.

The Molecule as a result become highly polar(N-H , O-H , H-F)

Energy of Hydrogen bond is 10-100 kJ/mol.

Strength of H- bond is determined on the basis of coulombic interaction between the lone pair of electron of electronegative element and the hydrogen atom of other molecule.

H-F-------H-F

In water : The H- bonding occur between the O- of one water molecule to the H- of the other water molecule

This results in increase in boiling point of water to a high value .That is the reason that water is liquid at room temperature. Other substance of same molar mass are gases if they do not have H 0 bonding.