Two vessels of the same volume, in the same location and open to the atmosphere. One is tall and of a small diameter, the other is short and is of a larger diameter. Each vessel supplied with an identical heat source. Each vessel filled with an equal volume of an identical liquid. The goal is to reduce the volume of the liquid in both vessels by 1/2. I know it will take exactly the same amount of energy to bring each vessel to the boil. The question is will the vessel with the larger surface area evaporate the liquid faster than the smaller one? Is there a formula or known and named relationship the would allow me to say "If I doubled the area available to evaporation, I would see an X increase in the rate of evaporation."?