Water at 60C and 1 atm is flowing at a velocity of 0.75 m/s pass an iodine crystal sphere. The radius of the iodine crystal sphere is 1.5 mm and the diffusivity of iodine in water is 8.26 x 10-10 m2/s. The density and viscosity of water at 60 C and 1 atm are: Density of water = 998 kg/m3 Viscosity of water = 4.6 x 10-4 Pa.s Calculate the mass transfer coefficient, kc from iodine crystal sphere to water.