CHE 307

Chemical Process Principles I

Homework Assignments

Fall 2004

Problems labeled "computer problems" in the book should be solved using Excel or Mathcad.. You do not write Fortran or Basic programs.
 

Chapter 2. 6 (432,000 mi), 14 (b.  a = 0.134 m/s^2), 20 (mean = 131.9, s = 2.219), 24 (a. kg = 0.89 m/s), 36 (k = 1.573)

Chapter 3. 8 (s solution = 1.5), 14 (c. 33.1 lb mole C6H6; g. 9.07e04 g H), 29 (a, 72.4 mol/min;  b, 76%), 31 (c.  t=200s, CA = 5.19 mol/L), 42 (h = 400cm, P = 6.83 cm Hg)

While working on the material of Chapter 3, you should also look at the first tutorial on the CD that came with the book.  The first one, Basic Calculations and Process System Variables, contains interactive problems that you should be able to do.

Chapter 4. 6 (If x2 were 0.5, m3 is 1810), 21 (a, mB = 400 lb/h), 26 (n1 = 95.7 kmol/min, y3 = 0.001, x4 = 0.246), 29 (overall B recovery = 97.1%, overall T recovery = 88.9%), 35 (moles CO2 absorbed/moles CO2 fed = 0.976;  flow to stripper = 680 mol/h), 47 OMIT PART d (extent of reaction = 0.115, 49 (selectivity of formaldehyde to carbon dioxide = 19;   mole fraction water = 0.4725), 59 (feed flow methane = 60 lbmol/h, oxygen = 45 lbmole/h), 66 (air flow = 250 kmol/h), 73 (65.1% propane) , 79 (weight fractions in fuel:  0.864 C, 0.117 H, 0.019 S ) 

There are two tutorials on the material in Chapter 4.  The first, Material Balances on Non-Reactive, Single Unit Processes, covers the material through Section 4.3.  The second, Material Balances on Reactive, Multi-Unit Processes, covers everything through the end of the chapter.

Chapter 5.  10 (V2 = 166 m/s), 17 (9.86 kg/min dry milk;  velocity = 0.207 m/s), 21 (V = 40.5 ft^3/s, 9.7% increase in diameter), 26 (b. dilution air = 3595 mol/s; c. mole fraction propane = 1.79%), 43 (Flow rate out = 538 L/min;  partial pressure of water in outlet = 0.0383 atm), 63 (Sample programs are available from the web.  For 200K, 6.8 atm, v = 2.1125 L/mol) 69 (P = 187 atm (ideal), 199 atm (SRK))

Chapter 6. 3 (Clausius Calpeyron, about 1% error;  linear, about 40% error), 10 (T = 6.6 C), 32 (n1 = 39.4 kmol/min, MeOH in gas stream = 0.0151 kmol/min), 41 (a.  0.221 mole N2/mole liquid), 53 (mole fraction N2 = 0.93), 61 (a.  min pressure for total condenser = 2752 mmHg;  c.  composition of vapor feed to partial condenser:  mole fraction nC4 = 0.912) , 73 (NOTE:  G1 and L2 are in equilibrium.  solvent flow = 3060 mol/h, gas flow = 5240 L/h)

The fourth tutorial, Material Balances on Multi-Phase Systems, covers everything through Section 6.4.  You should complete this by the end of the semester.