Why does water remain a liquid at room temperature (25°C), when materials of very similar molecular weight,Like ammonia and methane,
Exists as gases?

Question

Quizplus · Accepted Answer

Water has the highest ability to hydrogen bond among the three molecules mentioned. Hydrogen bonding is a strong intermolecular force that requires a high amount of energy to break, which leads to the higher boiling point of water compared to ammonia and methane. The van der Waals forces between water molecules are also strong, but hydrogen bonding is the dominant intermolecular force that keeps water as a liquid at room temperature.

Why Does Water Remain a Liquid at Room Temperature (25°C)