complete answer is required

(b) At a particular location in a distillation column, where the temperature is 360 K and the pressure 550 m Hg, the mole fraction of the more volatile component in the vapor is 0.7 at the interface with the liquid and 0.5 in the bulk of the vapor. The molar latent heat of the more volatile component is 1.5 times that of the less volatile. Calculate the mass transfer rates (kmol/m-.s) of the two components. The resistance to mass transfer in the vapor may be considered to lie in a stagnant film of thickness 0.6 mm at the interface. The diffusivity in the vapour mixture is 2 x 10 m/s. Calculate the mol fractions and concentration gradients of the two components at the mid-point of the film. Assume that the ideal gas law is applicable