Question

Water exhibits hydrogen bonding. Which option describes what this indicates about water?

Water will generally require more energy for a phase change compared to a similar substance without hydrogen bonds.
Water will generally have a lower boiling point compared to a similar substance without hydrogen bonds.
Water will generally require less energy for a phase change compared to a similar substance without hydrogen bonds.

Answer 1

Water will generally require more energy for a phase change compared to a similar substance without hydrogen bonds.

Reason: hydrogen bonds are relatively strong intermolecular forces, so more energy is needed to overcome them (e.g., to melt or vaporize water), giving water unusually high melting/boiling points and heat of vaporization for its molecular size.