AP BIOLOGY

Detailed explanation-1: -Water has a high boiling point because its molecules are bound together by hydrogen bonding, which is a very strong intermolecular force. It takes more kinetic energy, or a higher temperature, to break the hydrogen bonding between water molecules, thus allowing them to escape as steam.

Detailed explanation-2: -Ice also has a relatively high freezing and boiling point due to its hydrogen bonds as they’re stronger than Van der Waals forces therefore more energy is needed to break the hydrogen bonds resulting in higher freezing and boiling points.

Detailed explanation-3: -So despite its small molecular weight, water has an incredibly big boiling point. This is because water requires more energy to break its hydrogen bonds before it can then begin to boil.

Detailed explanation-4: -The unique properties of water are largely due to the strong hydrogen bonding that occurs between its molecules.

Detailed explanation-5: -Water forms strong intermolecular hydrogen bonding. Hydrogen sulphide does not. As we know, stronger the intermolecular forces, higher will be boiling point. Hence, water has higher boiling point over hydrogen sulfide.