When a liquid and its vapor are in equilibrium, the rates of evaporation of the liquid and condensation of the vapor are equal. Assume that every molecule of the vapor are equal striking the liquid surface condenses, and assume that the rate of the evaporation is the same when the vapor is rapidly pumped away from the surface, as when liquid and vapor are in equilibrium. The vapor pressure of mercury at 0 degrees celsius is 185 x10^-6 Torr and the latent heat of vaportization is about 340 J/g. Compute the rate of evaporation of mercury into a vacuum, in g/cm2s at a temparature of a) 0 degrees celsius and b) 20 degrees celsius?