HW6 - Department of Chemical Biochemical Engineering...

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Department of Chemical & Biochemical Engineering Rutgers, The State University of New Jersey 98 Brett Road Piscataway, NJ 08854 14:155:201 Chemical Engineering Analysis I Homework Assignment 6 (due 10/23/08) 1. In a device to produce potable water, humid air at 90°F, 29.7 in Hg, and 95% relative humidity is cooled to 40°F at constant pressure. What volumetric flow rate of air into the cooler (ft 3 /min) is required to provide 10.0 gal/min of condensed water? 2. A gas mixture containing 85.0 mole% N 2 and the balance n-hexane flows through a pipe at a rate of 100.0 m 3 /h. The pressure is 2.00 atm absolute and the temperature is 100°C. (a) What is the molar flow rate of the gas in kmol/h? (b) Is the gas saturated? If not, to what temperature (°C) would it have to be cooled at constant pressure in order to begin condensing hexane? (c) To what temperature (°C) would the gas have to be cooled at constant pressure in order to condense 80% of the hexane? 3.
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