Q1: A 100kmol/h stream that is 97 mole % carbon tetrachloride (CCl) and 3% carbon disulfide (CS2) is to be recovered from the bottom of a distillation column. The feed to the column is 16 mole %CS2 and 84%CCl4, and 2% of the CCl4 entering the column is contained in the overhead stream leaving the top of the column. [15] (a) Draw and label a flowchart of the process and do the degree-of-freedom analysis. [5] (b) Calculate the mass and mole fraction of CCl4 in the overhead stream, and determine the molar flow rates of CCl4 and CS2 in the overhead and feed streams. [10] Q2: A company is attempting to use a new proprietary chemical to strengthen wood fibers. The chemical is expensive and the company wants to reuse as much as possible. 100kg/h of wood and 4.00L/min of chemical are fed into a steady state mixer. The chemical stream is a combination of recycled and make-up streams. The mixture is then fed into a filter where the bottom product is equal parts mass of wood and chemical, the top product has a mass flow of 330kg/h. The top product is fed into an evaporator which has a pure chemical vapor stream. This vapor steam is condensed back into liquid and recycled into the mixer. Any non-vaporized mass leaves the bottom of the evaporator with a mass fraction of 0.5 chemical and combines with the bottom product of the filter. (Chemical density is 1kg/L ) [25] (a) Draw and label a flowchart of the process [6] (b) Do the degree-of-freedom analysis for overall and each unit. [8] (c) Calculate the mass flow rate of the make-up chemical stream and the combined mixture stream of the filter and evaporator. [11] Q3: The reaction between ethylene and hydrogen bromide to form ethyl bromide is carried out in a continuous reactor. The product stream is analyzed and found to contain 51.7 mole %C2H5Br and 17.3%HBr. The feed to the reactor contains only ethylene and hydrogen bromide. Calculate the fractional conversion of the limiting reactant and the percentage by which the other reactant is in excess. If the molar flow rate of the feed stream is 350mol/s, what is the extent of reaction? [10]