A sphere of naphthalene having a radius of 2mm is suspended in a large volume of shell air at 318 K and 1 atm. The surface pressure of the naphthalene can be assumed to be at 318 K is 0.555 mm Hg. The D AB of naphthalene in air at 318 K is 6.92 * 10 -6 m 2/sec. Calculate the rate of evaporation of naphthalene from the surface.