# What is the vapor pressure of water at 100 degrees Celsius?

$1$ $a t m o s p h e r e$
Vapour pressure or equilibrium vapour pressure or saturated vapour pressure is defined as the pressure exerted by a vapour in thermodynamic equilibrium with the condensed phases (solid or liquid) at a given temperature. At $100$ ""^@ $C$, the vapor pressure of water is 1 atmosphere; i.e. $100$ ""^@ $C$ is the normal boiling point of water.