# What point is the temperature at which water begins to condense?

Well, at $\text{1 atm}$ clearly, condensation occurs at $100$ ""^@C.
The normal boiling point of water is $100$ ""^@C. What do I mean by normal boiling point?
Below this temperature, there is the $\text{saturated vapour pressure}$, i.e. the equilibrium vapour pressure exerted by the liquid phase. Of course, at $100$ ""^@C the equilibrium vapour pressure is $\text{1 atm}$. Why?