A liquid begins to boil when?

  • A its vapour pressure is equal to the vapour pressure of its solid at the given temperature
  • B molecules start escaping from its surface
  • C its vapour pressure equals the atmosphere pressure
  • D its volume is sightly increased
jamb 1995chemistry

The correct answer is C. its vapour pressure equals the atmosphere pressure

The normal boiling point is the temperature at which the vapour pressure is equal to the standard sea-level atmospheric pressure.

Previous question Next question