Problem 2, 40 marks A mixture containing 50 mol% of tolune and 50 mol% of benzene at 96C is separated in a flash drum. The total feed flow rarte is 150 kmol/h and the flash drum is operated at 1 atm pressure. For this system, perform the following calculations assuming Raoult's law is valid: 1. Construct the temperature - composition (T-xy) diagram at 1 atm pressure. Show both the bubble and dew point curves. 2. What are the vapour and liquid phase compositions of benzene and tolune at the operating condition 3. By performing a steady-state mass balance, calculate the flow rates of the vapour and liquid streams leaving the flash drum. Use the Antoine's equation to estimate the vapour pressures : log10 p* = A - B T + p* in mmHg T in C (1) Benzene Toluene A 6.89272 6.95805 B 1203.531 1346.773 C 219.888 219.693