Question

When the vapour pressure of a liquid is equal to the atmospheric pressure, what happens to the liquid?

• A. The liquid freezes.
• B. The liquid evaporates.
• C. The liquid boils.
• D. The liquid does not undergo any change.

Answer 1

The correct option is C The liquid boils.

The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals the pressure surrounding the the liquid and the liquid changes into the vapor. The boiling point of a liquid varies depending on the surrounding emmision mental pressure.

Therefore, the liquid boils.