An initially pure gas stream at 75C flows through a 0.7 meter long packed bed of naphthalene spheres at a superficial velocity of 0.32m/s. The naphthalene spheres have a specific surface area of 327m2/m3 (i.e.: 327m2 of mass transfer surface area is available per unit volume of the packed column). The mass transfer coefficient in the gas phase is found to equal 0.05m/s and the column may be considered to operate under steady state conditions. (i) Develop the naphthalene molar balance in the gas phase. Your result should be an equation representing the concentration of naphthalene in the gas stream as a function of column length. (ii) Determine the relative saturation of naphthalene in the gas stream at the end of the tube Data: Naphthalene Properties Vapour Pressure at 75C5.61mmHg