Which of the following statements correctly defines the boiling point of a liquid? The temperature...

Physics

WAEC 2016

Which of the following statements correctly defines the boiling point of a liquid? The temperature at which the

A. saturated vapour pressure equals the atmospheric pressure
B. molecules leaves the liquid at a rate equal to the rate at which they return
C. molecules leave the liquid at a rate higher than that at which they return
D. molecules leave the liquid at a rate lower than the rate at which they return

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Correct Answer: Option A

Explanation

The boiling point of a liquid is the temperature at which the vapor pressure of a liquid is equal to the pressure of the atmosphere on the liquid, equal to 212°F (100°C) for water at sea level.

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