Question

The normal boiling point occurs when:

A) Vapor pressure equals atmospheric pressure
B) Temperature reaches its maximum value
C) Liquid turns into a solid
D) Pressure exceeds the critical point

Answer 1

The normal boiling point occurs when the vapor pressure equals atmospheric pressure. The boiling point of a liquid is the temperature at which its equilibrium vapor pressure is equal to the pressure exerted on the liquid by its gaseous surroundings.

Step-by-step explanation:

The normal boiling point occurs when the vapor pressure equals the atmospheric pressure. The boiling point of a liquid is the temperature at which its equilibrium vapor pressure is equal to the pressure exerted on the liquid by its gaseous surroundings. Therefore, option A) Vapor pressure equals atmospheric pressure is the correct answer.