An aqueous mixture of a volatile component A containing 7.94 mol% A, preheated to its boiling point is to be fed to the top of a continuous stripping column operated at atmospheric pressure. Vapour from the top of the column is to contain 11.25 mol% A. No reflux is to be returned. Two methods are under consideration, both calling for the same expenditure of heat, namely vaporisation of 0.562 mol per mole feed in each case. a) Method 1 is to use a still at the bottom of plate column, generating vapour by use of steam condensing inside a closed coil in the still b) In method 2, the still and heating coil are omitted and live steam is injected directly below the bottom plate (i.e. makes the ascending vapour flow). Equilibrium data is given in the table below. Use calculations to show the advantages of each method Make any reasonable assumptions necessary x 0.0035 0.0077 0.0125 0.0177 0.0292 0,0429 0.0590 0.0784 0.0100 0.0200 0.0300 0.0400 0.0600 0.0800 0.1000 0.1200 D D Yn X XF 1 B Xo B, X Schematic of the two methods Hint: to compare the two methods, you must construct the corresponding operating and equilibrium lines and calculate the number of plates in each process