A beaker of water at room temperature is placed in an enclosure, and the air pressure in the enclosure is slowly reduced. When the air pressure is reduced sufficiently, the water begins to boil. The temperature of the water does not rise when it boils; in fact, the temperature ?drops? slightly. Explain these phenomena.
Solution 28DQ Step 1 of 5: The boiling point is the temperature at which a liquid’s vapor pressure is equal to the atmospheric pressure pushing down on it. For water on Earth, the standard boiling point of water is given to be 100 °C. This temperature assumes that the water has one atmosphere of pressure pushing down on it. When this pressure is decreased, the temperature at which water can boil will decrease.