Suppose that I heat up a pot of cold water, the flame heats up the pot and conducts heat into the water. As a result, the overall average kinetic energy of the water molecules increases until water boils.
My question is about what is the atomic/molecular interaction between the hot pot and the water molecules. The atoms of pot are bound (the heat transfer will not exceed the work function of the metal) where as water molecules are unbound. From the atomic/microscopic level, how are the pot molecules increasing the kinetic energy of the water molecules? If possible, I would like to see both a classical as well as quantum mechanical explanation to this question.