*ELEMENTARY PRINCIPLES OF CHEMICAL PROCESSES*

ERRATA -- Student Workbook for 2005 Update Edition **Last updated:** 11/8/10

**First pages of selected problems.**All of the problems were supposed to start on right-facing pages so that filled-in solutions could be torn out and turned in. Unfortunately, some do not, so if the preceding problems are assigned the first pages of these problems will also be torn out. This problem will be remedied in subsequent printings, but for now the following first pages can be downloaded and printed by students (or by their instructors, who can photocopy and distribute them):

2.32, 2.38, 5.10, 5.23, 5.38, 5.46, 5.62, 5.80, 6.18, 6.24, 6.32, 6.39, 6.54, 6.60**p. 2-9, Prob. 2.31:**Rewrite the statement in parentheses as follows: "(or more generally, to determine the adjustable parameters in the given formulas from experimental data for the dependent and independent variables)"**p. 4-23, Prob. 4.32(a):**In the flow chart legend, change S = sugar to S =__solids__**p. 4-25, Prob. 4.32(c):**On Line 3, change 56% to 5__8__%**p. 4-27, Prob. 4.36(a):**In the statement just below the flow chart, change "as in feed to evaporator" to "as in feed to__filter__"**p. 4-35, Prob. 4.50(c):**In the chlorine balance (the last of the set of equations in the middle of the page), change 4*n*_{5}to__2__*n*_{5}**p. 4-38, Prob. 4.59:**On Line 5 of the overall process degree-of-freedom analysis, change 1 DOF to__2__DOF**p. 4.40, Prob. 4.59:**

-- In Box 4.59-11, change the units of*n*_{E}from mol C_{2}H_{4}to mol C_{2}H_{4}__/h__

-- On Lines 2 and 3 below the "Strategy" heading, put a dot above the*n*in*n*_{3}, and on Line 2 change 13.5 mol C_{2}H_{4}O to 13.5 mol C_{2}H_{4}O__/h__

-- On Line 2 below the "Solution" heading, put a dot above the*n*in (*n*_{3})_{original}, and change mol to mol__/h__in the denominators of the next two terms.**p. 4.42, Prob. 4.70:**In the N_{2}balance in Table (4.70-2), delete the "N_{2}" in (100 mol N_{2})**p. 5-11, Prob. 5.38:**In Eq. (5.38-2), change the "Initial" 528K to__298__K and the "Final" 528K to__508__K**p. 5-22, Prob. 5.46:**On the flow chart, change the units of all molar flow rates from mol/min to__k__mol/min (12 occurrences)**p. 5-23, Prob. 5.46:**

Line 3 below Box 5.46-2: Change "one the flow rate" to "on__c__e the flow rate"

Box 5.46-3. In Line 1, change the units of*n*_{0}from kg C_{5}H_{12}/min to__kmol__C_{5}H_{12}/min. In Line 2, multiply the right-hand side of the equation by__1.15__(since air is supplied in 15% excess).**p. 5-24, Prob. 5.46:**In Line 2 of Box 5.46-8, change 72.05 to 72.__1__5.**p. 6-11, Prob. 6.32(a):**In Line 1, change "methanol entering the absorber" to "__gas__entering the absorber"**p. 6-22, Prob. 6.60(b):**In the last line on the page (Eq. 6.60-8), change 0.040 to 0.0__6__0**p. 7-5, Prob. 7.21:**In Eq. (7.21-2), change N-m (above 1 atm in the dimensional equation) to__N/m__^{2}**p. 7-10, Prob. 7.28:**In the "Strategy" section, Paragraph 2, Line 2, change (saturated, 2.0 bar) to (saturated,__3__.0 bar)**pp. 7-13 and 7-14, Prob. 7.41:**On the flow chart and thereafter, change*x*_{o}to__y___{o}(4 occurrences on p. 7-13 and 4 occurrences on 7-14) and change*x*_{1}to__y___{1}(4 occurrences on 7-13 and 3 occurrences on 7-14). The changes are to be consistent with the usual text nomenclature of labeling vapor-phase mole fractions as*y*and liquid-phase mole fractions as*x*: they do not affect the solution.**p. 7-18, Prob. 7.45, line above (7.45-5):**Change 1 atm (~1 atm) to 1 atm (~1__bar__)**p. 8-20, Prob. 8.30:**In the E-Z Solve program of Box (8.30-12), on the line with the calculation of Hb, close the parentheses in 0.02894(T-500__)__**p. 8-37, Prob. 8.86:**In Eq. (8.86-4), change 64.86 to__-64.87__in Line 1, change -519 to -__64.87__in Line 3, and change the first term of Line 4 from -_____ to -__64.87__**p. 9-5, Prob. 9.16:**

-- On Line 3 of the first paragraph, change 1.00x10^{2}kg/h to 1.00x10^{2}kg/__min__

-- On Line 1 of Part (a), change kg SO_{3}/s to kg SO_{3}/__min__

-- On the flow chart, the molar flow rates of N_{2}in the feed air and product gas streams should be labeled 3.76(mol N*n*_{1}_{2}/s) (with dots over the*n*'s)**p. 9-6, Prob. 9.16:**. In Eqs. (9.16-3) and (9.16-4), insert "s" in the denominator of the first factor in each dimensional equation.**p. 9-14, Prob. 9.21:**In the energy balance equation [just above Part (b)], change -233.58 to -__231.9__(2 occurrences), and change 1.45x10^{-3}to 1.4__15__x10^{-3}. Change the final solution from 1.27 kJ to 1.__31__kJ.**p. 9-15, Prob. 9.33:**On flow chart, change the feed stream pressure from 1 atm to__5__atm

**Selected Answers (back of workbook)**

**Prob. 2.6:**Change 21,500 to 21,__7__00, and change 420,000 to__432__000**Prob. 2.31:**

Change Eq. (2.31-2) to (2.31-__3__)

In Eq. (2.31-5), change*s = a*to*s =*and delete__B__*I = b*

Delete Eqs. (2.31-14) and (2.31-17)**Prob. 4.21:**In Eq. (4.21-15), change the first 0.1 to 0.__0__1**Prob. 5.23:**In Eq. (5.23-3), change 1988 kg to__4__988 kg**Prob. 6.32:**In Eq. (6.32-3), change*z*_{m2}= 0.98 to*z*_{in}=__1.02__, and change*z*_{m1}= 1.02 to*z*_{out}=__0.98__.**Prob. 8.86:**

In Eq. (8.86-2), change 45.9 to__46.0__

In Eq. (8.86-3), change -0.1455 to -0.__15__

In Eq. (8.86-4), change -59.06 to -59.__1__**Prob. 9.21:**In Eq. (9.21-11), change 233.58 kJ/mol to__231.9__kJ/mol.

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