Why is the melting point of #CO_2# higher than #CH_3OH#? Wouldn't the melting point of methanol be greater because of the hydrogen bond?

1 Answer
Jul 26, 2017

Answer:

Carbon dioxide sublimes at #-78.5# #""^@C#......

Explanation:

The normal melting point of methanol is #-97.6# #""^@C#.

But here, clearly, we compare apples and oranges, by comparing a melting point, a transition from solid to liquid, to a sublimation point, a transition from solid to gas. On the other hand, the normal boiling point of methanol #+64.7# #""^@C#, and this indicates some considerable degree of intermolecular interaction.

The GREATER involatility of methanol may be attributed to intermolecular hydrogen bonding, which is a potent intermolecular force. The hydrogen bond may be maintained upon melting.