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Final exam, 2005

# Final exam, 2005 - Kinetics CHE 4473 Fall 2005 Name FINAL...

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Kinetics, CHE 4473, Fall, 2005 Name FINAL EXAMINATION OU Honor Council Integrity Pledge: On my honor, I affirm that I have neither given nor received inappropriate aid in the completion of this exercise. Name:______________________________________ Date:_____________________ Instructions : Work all problems. State all assumptions and show your work . Please put your name on all pages. The test pages must be turned in with your work. 28 pt. 1. The liquid phase reactions gmolA J H e k C k r U A gmolA J H e k C k r D A T A T A A A 4 2 4700 5 2 2 2 2 4 1 1 - 2100 2 1 1 1 10 5 . 2 , liter min gmol 10 6 . 1 , 2 10 4 , min 10 5 . 1 , × - = × = = - × - = × = = - - - take place in a jacketed CSTR. The reactor volume V is 100 liters and the feed volumetric flow rate v is 25 liters/minute. The feed concentration is C Ao = 2 M, C Do = C Uo = 0, and the feed temperature is 25 ºC. The heat capacity and density of the reactant/product are constant and equal to 4.2 kJ/(kg·K) and 1 kg/liter, respectively. a. Determine the value of C A ,C D and C U if the reactor is operated at 50 ºC. b. Determine the rate of heat transfer to/from the reactor if it is operated at 50 ºC. c. Using the charts below, sketch the expected effect of residence time τ on S DU (at constant reactor

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