Water Boiling at Room Temperatures, Under a Vacuum

If the water pressure goes up, as in the bottom of the Mariana Trench; where the pressure is about 7.5 tons per square inch, then the boiling and freezing points of the water goes up, If, however, the atmospheric pressure goes down, as on the top of Mount Everest, then the boiling and freezing points of the water goes down. In the case of the top of Mount Everest, the boiling point of pure water is about 72 C. The experiment shows how water can boil at quite low temperatures, under a vacuum.