Question

At higher altitudes the boiling point of water decreases because

Answer 1

As elevation increases, atmospheric pressure decreases because air is less dense at higher altitudes. Because the atmospheric pressure is lower, the vapour pressure of the liquid needs to be lower to reach boiling point. ... Theboiling point is lower at higher altitude.

Answer 2

hello user,

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•Doubt : why the boiling point of water decreases at higher altitudes .

•Answer : At higher altitudes, the atmospheric pressure decreases ( because the density of air decreases ) .
>Because of this decrease in atmospheric pressure , the vapour pressure has to be lower to reach the boiling point.
>Hence, less heat is required to equalise vapour pressure to the atmospheric pressure.
>Therefore, the boiling Point decreases at higher altitudes.

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