A spherical ball of solid, nonporous naphthalene (i.e. a "moth ball") issuspended in still air, the naphthalene ball slowly sublimes, releasing the naphthalene into thesurrounding air by molecular diffusion limited process. Estimate the time required to reducethe diameter from 2 cm to 0.5 cm when the surrounding air is at 347 K and 1.013 x 105 Pa.Naphthalene has a molecular weight of 128 g/mole, a solid density of 1.145 g/cm3 , a diffusivityin the air of 8.19 x 10-6 m/s, and exerts a vapor pressure of 5 torr at 347 K.