Question

If a droplet forms directly from the vapor phase, it must be composed of a very small number of molecules and indeed this is the case. Droplets formed directly from the vapor are initially composed of about 50 water molecules. (a) Estimate the pressure inside a newly formed droplet assuming that the surface tension is a constant. (b) How high would the relative humidity (RH) have to be in order to keep the droplet in equilibrium? (c) Forming these droplets directly from the vapor causes a heating. Is this heating different than what would occur for a flat surface of liquid? If so, what is the fractional change in the heating.

Answer 1