I am not sure but I think its boiling, hope this helped :)
When water boils, the heat converts some of the water to steam and each bubble is a steam bubble. Steam is a gas that is lighter than water, and so the bubbles rise to the surface of the water where the steam is released. As the steam cools in the air, it forms water vapor, and that is what we see. Most people call the vapor "steam", but steam is a transparent gas, like air.
As the flask expands,hor air is being pushed out,therefore,air bubbles are formed.
Cause of the presence of carbondioxide
As heat increases the surface tension decreases.
when it is changing into gas... bubbles. It is boiling when bubbles begin breaking the surface. the water o nthe bottom is being heated it mixes when it rises because of convection currents. after the water is almost 100 C the water that gets hot enough evaporates and comes out as water vapor. The bubbles are full of steam which gets released when the bubble hits the surface.
bubbles rise to the surface of a heated liquid as it changes to gas because they are less dense than the liquid.
hot air
Dissolved gas becomes less soluble as the temperature rises, and therefore leaves the solution and makes bubbles.
Yes there is a chemical reaction called 'Effervecense'.
When water boils, the heat converts some of the water to steam and each bubble is a steam bubble. Steam is a gas that is lighter than water, and so the bubbles rise to the surface of the water where the steam is released. As the steam cools in the air, it forms water vapor, and that is what we see. Most people call the vapor "steam", but steam is a transparent gas, like air.
The heated particles will move into the space were the bubbles are and stay there as they cannot escape for a bit. This will mean that the cup will stay warm as it will be sourrounded by captured heat energy.
Uually the only time you see this is in old glass. This is just old glass that was made by a less refined process and occasionally bubbles appeared in the glass. Some people actually search for windows of this vintage.
Then that molecule will escape the surface of the liquid and become a molecule of gas. This is the process by which water slowly evaporates even when not heated.
When a droper is dipped into water and its bulb is pressed air bubbles seems to occur in water because the dropper was filled with air before it was dipped in water and when we press the bulb air comes out forming air bubbles and the space is filled with water .
It bubbles up dummy.
Hydrothermal vents.
Then it is boiling