Question 22
Change of State and VapoursIf the pressure of the vapour on top of an enclosed liquid is equal to the atmospheric pressure, what will be the temperature of the liquid enclosed?
- A.Room temperature
- B.Boiling point
- C.Freezing point
- D.Standard temperature
Show the answer and explanation
Answer: B (Boiling point)
Explanation
A liquid boils when its saturated vapour pressure equals the external (atmospheric) pressure, so the liquid is at its boiling point.