CHBE 241 Material and Energy BalancesDepartment of Chemical and Biological EngineeringThe University of British ColumbiaProblem Session #2Tuesday, 26 September 2006, CHBE 101, 2–4pm1. If air contains 79 mol% N2and 21 mol% O2, what is the mass (in grams) of 1 mol of air? What isthe wt% N2and O2in air?2. Your company needs an on-site storage of 60,000 lb ammonia. You decide to build a sphericalvessel. What is the radius of the vessel needed if you store the ammonia(a) as gas at STP(b) as gas, at 80◦F and 5 atm(c) as liquid at -30◦F and 1 atm(d) as liquid at 80◦F and 11 atm?Considering costs, safety, and operability, what temperature and pressure would you pick and why?(The density of liquid ammonia is 42.6 lb/ft3at -30◦F and 37.5 lb/ft3at 80◦F.)3. Vinyl chloride (C2H3Cl) is used to make polyvinylchloride (PVC) for piping and other products.In the direct chlorination process, ethylene (C2H4) and chlorine (Cl2) are used as raw materials.
This is the end of the preview.
access the rest of the document.
ammonia synthesis reactor, C2 H3 Cl, Energy Balances Department