A gas absorption tower of diameter 2m contains ceramic Raschig rings randomly packed to a height of 5m. Air containing a small proportion of sulfur dioxide passes upwards through the absorption tower at a flow rate of 6m3/s. The viscosity and density of the gas may be taken as 1:80105Pas and 1:2kg/m3, respectively. Details of the packing are given below: Ceramic Raschig rings surface area per unit volume of packed bed =190m2/m3, voidage of randomly packed bed ()=0.71 A. Calculate the diameter, ds, of a sphere with the same surface-volume ratio as the Raschig rings. B. Calculate the frictional pressure drop across the packing in the tower. C. Discuss how this pressure drop will vary with flow rate of the gas within 10% of the quoted flow rate. D. Discuss how the pressure drop across the packing would vary with gas pressure and temperature