what happens is that the heat gets trapped in the container and it turns foggy
evaporate
If a liquid is not in a container it will evaporate.
small container
Pressure in the container gets higher because of the steam deriving from water, and if you do not let the steam out it will probably explode in a short time.
When solids are heated they turn into liquid
Melts into a liquid.
it expands
it expands
it expands
If a liquid is not in a container it will evaporate.
It contracts.
It gets the liquid get the shape like water.