Which of the following statements correctly defines the boiling point of a liquid? The temperature at which the
-
saturated vapour pressure equals the atmospheric pressure
- molecules leaves the liquid at a rate equal to the rate at which they return
- molecules leave the liquid at a rate higher than that at which they return
- molecules leave the liquid at a rate lower than the rate at which they return
The correct answer is: 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.