A 2 cm long microprocessor is cooled by a 2 m/s stream of dry air over the flat surface covered by a thin layer of water. Provided that the heat and mass transfer analogy is applicable, determine the heat lost by evaporation when air at 27 $^\circ$C is available for cooling. The specific volume of saturated water vapor, heat of vaporization and diffusion coefficient are 39.13 m$^3$/kg, 2438 kJ/kg and 2.6 \times 10$^{-5}$ m$^2$/s, respectively. The viscosity of air is 15.89 \times 10$^{-6}$ m$^2$/s.