The heat energy required to change the liquid into gas is known as Heat of Vaporization.
(The heat energy; required; ) (The heat energy; to change; the liquid; into gas) (The heat energy required to change the liquid into gas; is known; as Heat of Vaporization)
The heat energy The heat energy The heat energy required to change the liquid into gas
required to change is known
the liquid into gas
as Heat of Vaporization