6.2-5. Mass Transfer from a Naphthalene Sphere to Air. Mass transfer is occurring from a sphere of naphthalene having a radius of 10 mm. The sphere is in a large volume of still air at 52.6°C and 1 atm abs pressure. The vapor pressure of naphthalene at 52.6°C is 1.0 mm Hg. The diffusivity of naphthalene in air at 0°C is 5.16 x 106 m²/s. Calculate the rate of evaporation of naphthalene from the surface in kg mol/s. m². [Note: The diffusivity can be corrected for temperature using the temperature- correction factor from the Fuller et al. equation (6.2-45).]