Why is the vapour pressure of a boiling liquid the same as the ambient pressure?

1 Answer
anor277
Mar 29, 2016

Because that is the definition of a boiling point.

Explanation:

Boiling points are the conditions of temperature and pressure, when the vapour pressure of a liquid is EQUAL to the ambient pressure, and bubbles of vapour form directly in the liquid.

At the normal boiling point, the ambient pressure is specified to be 11 "atmosphere,"atmosphere, and thus the vapour pressure of the substance is 11 atmatm.

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