Vedeliku keemistemperatuur varieerub sõltuvalt ümbritsevast keskkonnarõhust ning vedelikul, mis on osalises vaakumis, st madalamal rõhul, on madalam keemistemperatuur, kui see vedelik on atmosfäärirõhul ning seetõttu keeb vesi temperatuuril 100 °C (või teaduslikult: 99,97 °C) merepinna tasemel oleval rõhul ja temperatuuril 93,4 °C 1 905 meetri kõrgusel.
The boiling point of a liquid varies depending upon the surrounding environmental pressure, and a liquid in a partial vacuum, i.e., under a lower pressure, has a lower boiling point than when that liquid is at atmospheric pressure, and because of this, water boils at 100 °C (or with scientific precision: 99,97 °C) under standard pressure at sea level, but at 93,4 °C at 1 905 metres altitude.
The normal 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, one atmosphere.
