# Why is water a liquid at room temperature and pressure? Please be concise.

And the propensity for hydrogen bonding results from the polarity of the water molecule, which we could represent as ""^(delta+)H-stackrel(delta-)O-H^(delta+) - in solution these dipoles align appropriately, and this is a potent intermolecular force.
You should compare the normal boiling of water to that of other small molecules, $H F$, $H C l$, $N {H}_{3}$, $C {H}_{4}$ etc. What do you find?