In distillation column, a mixture of 2 000 kmol/h CH4 000 kmol/hr of C2H4, 3 000 mol of C2H6, 600 kmol/h of C3H6, 400 kmol/h C3H8 and 200 kmol/h of n-C4H1o is mandled. The bottoms contain 80 kmol/h of C2H6, while the distillate contains 120 mol/h of C3H6. Cable 1 shows the K-values determined at 277K and 8 300 kPa. The K-values can e assumed to be constant regardless of temperature variation. Table 1: K-values at 277K and 8 300 kPa CH4 21 C2H4 19.92 C2H6 13.33 C3H6 6 C3H8 2.46 n-C4H10 1.5 1.1. 1.2. Complete the material balance and calculate the mole fraction for the feed, distillate and bottoms products, (4) Determine which components are the light key and heavy key components in the system. (2) Calculate the relative volatility (a) for each component. (2) Use Fenske's equation to determine the minimum number of plates. (3) [11 marks] 1.3. 1.4. PROUDLY SOUTH AFRICAN