What is it called when a liquid turns into a gas without boiling?

solution;

Boiling point is the temperature at which liquid is transformed into vapor when heat is applied. It is the temperature at which an element or substance starts to boil. The boiling point of water is 100 °C or 212 °F.  

This process is known as vaporization at higher altitudes the temperature of the boiling point is lower.

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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