Why is wrong to say that "water boils at 100 degrees celcius?
March 12th, 2010
Water boils at whatever temperature that the vapor pressure of the water is equal to the ambient pressure.
At sea level, the ambient pressure happens to be 760 mm Hg, which is the vapor pressure of water at 100C. Therefore water boils at 100C.
At some higher elevation, the ambient (atmospheric) pressure will be less and the boiling point of water will be whatever temperature whee the vapor pressure equals the ambient pressure.
Sea water will boil at a lower temperature.
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