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Unformatted text preview: ChEn 2001, Homework #3 Due Monday, September 28, 2009 Problem 1. Perform the following unit conversions: 1. 3.00 ft/s 2 to centimeters per hour 2 2. 10 psi to cheval vapeur minutes per US fluid ounce 3. 5.00 J/ C to cal/ F 4. 1.0 hp to dry US bushels centipoise per millisecond 2 5. Convert the speed of light into standard US barrels of oil per acre attosecond Problem 2 (Murphy 2.25). Methane (75 C, 10 atm, 100 kgmol/min) and oxygen (25 C, 10 atm, 400 kgmole/min) are mixed and heated (200 C, 10 atm) before being sent to a burner. What is the volumetric flow rate, the mass flow rate, and the mass fraction of methane in the stream leaving the preheater? You can assume the mixture obeys the ideal gas law. Problem 3 (Murphy 2.32). Hard water contains calcium, magnesium and other mineral salts that tend to deposit on piping, coffeepots and bathtubs. Hard water is softened in water softeners. In a water softener, hard water flows over ion exchange beads in a vessel. The beads carry sodium ions. Calcium and magnesium ions from the water preferentially stick to the beads,carry sodium ions....
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- Fall '08