How is it that bubbles form on the bottom of a surface of a pot of boiling water? I think that there is probably an elementary answer to this from chemistry. But I am thinking of something more along the lines of kinetics. I think that perhaps there is enough energy on the bottom surface of the pan to put some of the water molecules into a gaseous state. Perhaps this only happens to the layer of water very close to the bottom of the pot at first. Maybe the pressure of the vapor inside the bubble is balanced by the pressure of the fluid. Also, how is it that once a bubble acquires enough energy it is able to detach from the bottom surface of the pot and rise to the top?