Water Boiling Temperature vs Pressure in Vacuum Table Chart
The boiling point of water is the temperature at which the vapor pressure of the liquid water equals the pressure surrounding the water and the water changes into a vapor.
Water at high pressure has a higher boiling point than when that water is at atmospheric pressure. In other words, the boiling point of water varies depending upon the surrounding environmental pressure. For a given pressure, different liquids boil at different temperatures.
The normal boiling point (also called the atmospheric boiling point or the atmospheric pressure boiling point ) of a liquid is the special case in which the vapor pressure of the liquid equals the defined atmospheric pressure at sea level, 1 atmosphere . At that temperature, the vapor pressure of the liquid becomes sufficient to overcome atmospheric pressure and allow bubbles of vapor to form inside the bulk of the liquid.