What is hydrogen bonding and why does water have a higher boiling point than methanol?

Hydrogen bonding is an intermolecular interaction between a partially positively charged hydrogen atom on one molecule and a partially negatively charged atom on another molecule. The difference in charge is due to the atom bonded to the hydrogen being more electronegative. Water has two partial positive hydrogens and one partial negatively charged oxygen whereas methanol only has one partial positive hydrogen (with the methyl group being unable to take part in hydrogen bonding). From this, a greater amount of hydrogen bonding can take place between water molecules than between methanol molecules. Thus a greater amount of thermal energy is needed to overcome these intermolecular forces for water, leading to its boiling point being higher than methanol.

MQ
Answered by Max Q. Chemistry tutor

23508 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

What is a dynamic equilibrium?


By comparing the forces involved, explain why hydrogen iodide (HI) would have a higher boiling point than hydrogen bromide (HBr)?


Describe briefly the nature of metallic bonding and use this to explain why metals are malleable (can be hammered into shape) and conduct electricity


What is the pH of a 25 ml sample of 0.2 M sulfuric acid? What is the pH after 5 ml of 0.25 M sodium hydroxide is added?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning