ChE 230 Spring 2010 Problem Set 9 04/13/10 - 04/20/10
1. The mass balance for a chemical in a completely mixed reactor can be written as
dC = F QC kVC2 dt where V = reactor volume (10 m3), C = concentration (g/m3), F = feed rate (200 g/min), Q = flow rate
ChE 230 Spring 2010 Problem Set 8 04/06/10 - 04/13/10
1. The heat capacity at constant pressure of a gas is determined experimentally at several temperatures with the following results:
T (oC) CP (J/mol oC)
0 33.5
100 35.1
200 36.7
300 38.4
400 40.2
500 4
ChE 230 Spring 2010 Problem Set 7 03/16/10 03/23/10
1. The vapor pressure (P*)of ethylene glycol at several temperatures is given below: T (oC) P* (mm Hg) 79.7 5.0 105.8 20.0 120.0 40.0 141.8 100.0 178.5 400.0 197.3 760.0
Using Mathcad, Polymath and hand
ChE 230 Spring 2010 Problem Set 6 03/09/09 03/16/09
1. Refer back to Problem 3 on the last Problem Set. Use the same confidence levels. a. Based on the 48 data points, was the variance of the reaction temperature really 1.95 in the past? b. Repeat part (a
ChE 230 Spring 2010 Problem Set 5 03/02/10 03/09/10
1. Years of operating data suggest that the time to run a batch reaction to completion is distributed normally with = 1.86 hr and = 1.25 min. a. What is the probability that the reaction time of the next
ChE 230 Spring 2010 Problem Set 4 02/04/10-02/11/10
1. (Linear equations) A separation system takes the feed (F) consistin of three species (A,B, and C) as shown in the diagram below and creates the three exit streams (V, S, L) each with a different compo
ChE 230 Spring 2010 Problem Set 3 01/28/10-02/04/10
1. Three matrices are defined as 1 6 A = 3 10 7 4
6 0 B= 1 4
1 1 C= 6 8
a) Perform all possible matrix multiplications that can be computed between pairs of matrices. b) Justify why the remaining pairs
ChE 230 Spring 2009 Problem Set 2 01/19/10-01/26/09
1. The SRK equation of state is similar to the van der Waals equation and is given by RT a P= V b V( V + b) For N2O Tc = 309.6 K R= 0.08206 L atm/K mole Pc = 72.4 atm a = 0.42748(R Tc)2/Pc = 0.165 b = 0.
ChE 230 Spring 2010 Problem Set 1 1/12/10-1/19/10
1. The velocity (V) of a falling parachutist as a function of time (t) can be calculated using the equation gm V( t ) = ( 1 e ( c / m )t ) c where c is the drag coefficient, g = 9.8 m/s2 is the acceleratio