Question

Is the boiling point of water measured at sea level greater than, less than , same as that measured at an elevation of 1 mille.

Answer 1

The boiling point of any liquid is defined as the point at which the liquid’s vapor pressure becomes so high such that a constant flow of vapour keeps coming out from the liquid.

Now considering the boiling point of water, when the atmospheric pressure increases, the vapour pressure of the water also increases. This implies, that the hotness of water is directly proportional to the atmospheric pressure.  

Thus, we can say that the boiling point of water at sea level would be greater than that measured at any elevation above sea level because when the elevation is less, the atmospheric pressure is high.