Please give detailed solution

Q3) Air at 20C and 1 atm pressure flows through a bed of naphthalene balls, 5 mm in average diameter. = = Data: The superficial gas velocity = 0.2 m/s; fractional bed voidage = 0.65; specific surface area of the bed 140 m/m'; gas-phase mass transfer coefficient, k, = 70 m/h; vapour pressure of naphthalene at 20C = 1.7 x 104 bar. = If the air leaving the bed has 0.0138 mol% naphthalene vapour in it, calculate the bed height. Also calculate the sublimation flux at the inlet and at the exit of the bed. Estimate the mass transfer coefficient using the correlation, js = 0.17 Re-0.415 and compare with the given value. Take kinematic viscosity, v= 1.5 x 10-5 m/s for air; DAB = 5.8 x 10-6m/s