Question

give reason -
1)H2O is liquid while H2S is a gas
2) NH3 has higher boiling point than NF3
3) boiling point of HF is lower than H2O

Answer 1

Explanation:

Its because of hydrogen bonding that occurs between the H and O of adjacent water molecules. Its a very strong bond that packs the water molecules closely together, forming a liquid. On adjacent molecules of H2S, sulfur does not attract H nearly as strongly so they dissociate into a gas.

The boiling point of NH3 is higher than that of NF3 because NH3 molecules can form hydrogen bonds with each other increasing the attractive forces relative to the dispersion and dipole forces between the NF3 molecules.

No bonds in between atoms are broken, just the bonds in between water molecules, in this case hydrogen bonding. ... Hydrogen bonding is one of the most powerful intermolecular forces, which is why water has such a high boiling point.