Question

No heat is supplied to a liquid during evaporation. How does the liquid change into its vapour state?​

Answer 1

Answer

It can be a volatile liquid. which evaporates by taking heat from the surroundings.

$\large\bold{\boxed{\boxed{Volatile\:means\: a\:liquid\: which\: can \:evaporate\: without\: reaching\: its\: boiling\: point.}}}$

Examples of volatile liquids:

1.Water

2.Acetone

3.kerosene

Fun fact:

It is the reason why when the sweat evaporates taking the heat from our body we feel cold in summer.

Answer 2

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Evaporation:

It is a process when a substance change its state from liquid to gaseous in heating.

The heat is in the atmosphere which leads to the evaporation itself without supplying external heat.

So your answer :

Maybe it's depends upon the atmopheric heat and it's rarley impossible to reach the boiling point of water which is 100°C