The mass flux from a 5 cm diameter naphthalene ball placed in stagnant air at 40°C and atmospheric pressure, is 1.47 10-3 mol/m2. sec. Assume the vapor pressure of naphthalene to be 0.15 atm at 40°C and negligible bulk concentration of naphthalene in air. If air starts blowing across the surface of naphthalene ball at 3 m/s by what factor will the mass transfer rate increase, all other conditions remaining the same (use Fröessling)? The viscosity and density of air are 1.8 *10-5 kg/m. s and 1.123 kg/m3, respectively and the gas constant is 82.06 cm3. atm/mol. K. You are going to have to figure out how to covert between kc and kg, and how to get DAB.