1. A mixture of benzene (A), toluene (B) and xylene (C) is separated by a set-up of 3 distillation columns and a mixer as shown in Figure 1 below. At steady state, the data in Table 1 are taken. Calculate the values for all the unknowns Table 1 and fill in the values in the table. Give all your answers to an accuracy of 2 decimal places. Show your working clearly in your answer sheet. Material Streams kg/h M1 (Feed) Components A B C M1 100.0 45.0 30.0 25.0 Column 1 M2 11.83 M2 M3 M3 Figure 1 Column 2 Table 1 M4 M5 2.73 0 M4 M6 Composition in wt% 2.5 M5 25.0 Column 3 M6 10.15 M7 M8 M7 32.0 6.25 M8 4.17 (50 marks) 192 Z

Fig: 1