*ELEMENTARY PRINCIPLES OF CHEMICAL PROCESSES*

ERRATA -- Third Edition, Printings 5-11

Last updated: 9/22/11

**Changes from the text are underlined.**

- Inside front cover, Factors for Unit Conversions: In the "volume" category, change 220.83 imperial gallons to
__219.97__imperial gallons. - p. xxvi. Change the page number of Chapter 14 from 607 to
__602__. - p. 16, Line 3 (equation). Denominator of first fraction should be 0.
__000__478 (not 0.00478) - p. 18, Line 4 above Figure 2.5-1 ("for example, relatively..."): Change 0.30 to 0.
__98__and 0.55 to 0.__99__. On the next line, change 50 to__169__and 7.1 to__13__. On the first of the two plots [Data Set (a)], change*X*_{max}= 72% to*X*_{max}= 7__3__%. - p. 32, Prob. 2.15. In Line 3, add "Express
*g*in ft/s^{2}." - p. 36, Prob. 2.30. Line 1 should read "...from the given information
."*if possible* - p. 37, Prob. 2.32, last line of data table: Change 0.170 to
__0.169__. - p. 65, Prob. 3.1(c), Line 3. Insert a period after the second word ("stones"). Change the adjacent parenthetical statement to "(A
*stone*is a unit of mass equal to 14 lb_{m}. It is commonly used in England as a measure of body weight, which like the numerical equivalence between lb_{m}and lb_{f}is only valid at or near sea level.)" - p. 67, Prob. 3.12(b), Line 2: "...sample of the stream is measured
__at 50__^{o}__C__and found to be 0.9940 g/cm^{3}. - p. 75, Prob. 3.43. In the figure, move "H
_{2}O" right, so that it clearly labels the water entering the pipe and not the space above the fluid in the sealed end of the manometer. - p. 99, Item 2 in list, Line 2: ...must be specified before
__all of__the remaining variable values... - p. 101, Section 4.3e, Item 2(c), Line 2: Change (kg SO
_{2}/s) to (kg__H___{2}/s) - p. 108, Line 6 below flow chart: "...degree of freedom. Similarly,
__the first extractor has two degrees of freedom, the second extractor has one__, the extract mixing point has three,...." - p. 114, Line 1: Change fresh food to fresh f
__ee__d - p. 114, Line 6 from bottom:
*m*_{4}= 1470__kg__K_{2}CrO_{4}crystals/h - p. 119, 3rd paragraph:

"More generally, if__2__ξ kmol H_{2}reacts (where 2 is the stoichiometric coefficient of H_{2}), we may follow the same reasoning and write"

1^{st}equation (expression for*n*_{H2}) : Change ξ to 2ξ

2^{nd}equation: Change (1/2)ξ to__ξ__

3^{rd}equation: Change (1/2)ξ to__ξ__ - p. 143, Line 3. Change "nitric acid" to "nitric
__oxide__." - p. 155, top line. Delete the bullet in front of proportion.
- p. 157, Prob. 4.6(b). Change "mole fractions" to "
__mass__fractions" on Lines 1 and 3. - p. 169, Prob. 4.37,
*Data*(bottom of page).

Item 1: Change 2 lb_{m}of dirt to__2.0__lb_{m}of dirt

Item 4: Change 8% Whizzo to__8.0__% Whizzo - p. 171, Prob. 4.41(d), Line 3. Change "part (a)" to "part (
__b__)." - p. 175, Prob. 4.52, last line: Change "acid" to "
__aqueous hydrofluoric__acid" - p. 176, Prob. 4.55. The problem is technically correct but unnecessarily confusing. Click here for an improved version.
- p. 185, Prob. 4.76(a), last line. Above the arrow, change 800
^{o}C, N_{2}to 800^{o}C,__O___{2}. - p. 196, Line 3. Change 323 K to
__4__23 K. - p. 201.

- Line before Eq. (5.3-2): Change "Truncating...yields" to "A simple approximation that uses only the second virial coefficient is"

- Eq. (5.3-2): Change the right-hand side of the equation to 1 + (BP/RT) - p. 202, bulleted paragraph at the top of the page.
__Delete everything after the first sentence__("Solution for*P*...closest to*V*.")_{ideal} - p. 202, Example 5.3-1

- last bulleted item: Equation (5.3-2) ==> P = RT/(V^-B)

- next line: = (0.08206 L-atm/mol-K)(122.4 K)/[1.50 L/mol - (-0.113 L/mol)] = 6.__23__atm

- last line of example: Change 8.7% to 8.__0__% - p. 202, Last sentence (
*Perry's*...to 3-272): Replace with "Standard thermodynamics references (e.g., S.M. Walas,*Phase Equilibria in Chemical Engineering*, Butterworth, 1985) describe the BWR equation of state and give the eight constants for a number of gases." - p. 209, Figure 5.4-2. The figure has been misdrawn, with an extra horizontal grid line between
*z*= 0.9 and*z*= 1.0. The ordinate labels should not be changed, so that the curves still asymptote to*z*= 1.0 on the left. The resulting errors in reading the value of*z*for given reduced conditions are on the order of 1-3%. On the same figure, in the numerical labels on the reduced volume curves (dashed curves), the label between 3.00 and 2.40 should be 2.__6__0 (not 2.00). - p. 221, Footnote 14. Replace the footnote text with
__Hint: Monochlorobenzene is a__*chlorinated hydrocarbon*. - p. 223, Prob. 5.36(b), Line 2: ...values determined in Part (
__a__). (not b) - p. 223, Prob. 5.37. In Part (b) and in the expression for
*y*_{A}in Part (c), put a dot over the*m*in*m*_{A} - p. 224, Prob. 5.41(a). "One million gallons
__per day__of alkaline wastewater containing 0.03 mole NH_{3}/mole__ammonia-free__H_{2}O is fed..." - p. 228, Prob. 5.51(b).

- Line 14 (begins with "K."): Change*K*x10_{pc}^{8}to*K*x10_{yc}^{8}. (The rest of the line is correct.)

- Line 15 (begins with "L."): Change the expression following the L. to (*K*_{p}P^{2}-*K*)x10_{pc}^{8}. (The rest of the line is correct) - p. 228, Prob. 5.53. In the stoichiometric equation on Line 3, change the stoichiometric coefficient of O
_{2}to__3__(not 3/2) and the molecular formula of TPA to C_{8}H_{6}O_{4}(not C_{8}H_{6}O) - p. 230, Prob. 5.55, Line 2. Change 5.3-4 to 5.3-
__2__ - p. 256, Line 1 under "SO
_{2}Balance": Change*L*_{2}(lb_{m}) to*n*_{L2}(lb_{m}) (with a dot above the*n*) - p. 243, line above bottom equation (6.1-2): delete 1 r from "rearrrange"
- p. 264, Section 6.5a, Line 4: Change AgCO
_{3}to Ag_{2}CO_{3} - p. 283, Prob. 6.20: On Lines 4 and 5, change 16 psia to 16 psi
__g__. - p. 285, Prob. 6.26(b). Delete the second sentence "(At the latter temperature...essentially zero)"
- p. 287, Prob. 6.32(a): In Line 1, change "methanol entering the absorber" to "
__gas__entering the absorber" - p. 288, Prob. 6.37, Line 2: delete "82.1% N
_{2}" and "8.6% O_{2}and". The line should read

molar composition: 6.9% CO_{2}, 2.1% CO, 0.265% C_{6}H_{14}__(+ O___{2}__and N___{2}__)__. The stack gas - p. 290, Prob. 6.42: On the flow chart, label the second unit "Cooling,
__hydration, and oxidation__" (When calculating the amount of oxygen fed, it is important to remember that some is needed for the final stage of the process as well as in the converter.) - p. 296, Prob. 6.64:

- On the schematic of Stage*i*adjacent to the diagram of the column, change*y*+1 to_{i}*y*_{i}__-1__, and change*x*_{i}__-1__to*x*_{i}__+1__.

- In Part (b), add the sentence "__Assume the stage temperature is 50__^{o}__C__."

- In Part (d), Row 4 of the spreadsheet, change*y*to_{e}*y*. On the line below the spreadsheet, change_{N}*x*to_{i}*x*_{1}. - p. 298, Prob. 6.67(a), Line 2. In the expression for
*f*, make it (moles of vapor__produced__)/(mole of liquid__fed__) - p. 301, Prob. 6.73, "Data on Process Streams" to the right of the flowchart, bottom line: Change G
_{2}to G_{1} - p. 302, Prob. 6.74. Change NHCO
_{3}to N__a__HCO_{3}in Line 1 and at the beginning of Line 2. - p. 304, Prob. 6.85, Line 3: "to 1.00 kg of
__the solution__to raise the normal boiling point by__an additional__3^{o}C." - p. 318, 2nd line below Eq. (7.3-2). "
__initial__system energy..." (not intitial) - p. 323, Eqs. (7.4-14b) and (7.4-14c): Insert dot above
*m*(4 occurrences) - p. 324, figure in Example 7.4-2. The
*Q*arrow should be pointing into the box rather than coming out of it, and there should be dots above*Q*and*W*. - p. 338, footnote. The second conversion factor should be [(1 kJ)/(
__10__^{3}__N__^{.}__m__)] (not [(1 kJ)/(1 N^{.}m/s)] ) - p. 340, Line 5 below Eq. (7.7-2): Delete the inverted question mark between "of" and "Equation."
- p. 345, Prob. 7.23. In Line 4, change 20.2 kJ to 20.2
__J__. - p. 350, Prob. 7.42, Line 6 below "Stream Data" (Boilup): Change "Liquid" to "
__Vapor__" - p. 351, Prob. 7.48, Line 4: Delete "&rDelta;
*H*= 2919" - p. 352, Prob. 7.49, Line 2. "...a face area of 400 cm
^{2}..." (not cm^{3}) - p. 355, Prob. 7.54(b). In the figure, change 3.5 bar to 3.
__1__bar - p. 367, 4 lines below Eq. (8.3-5): Delete &rDelta; before last
*V*_{2} - p. 370, line above "Calculate &rDelta;
*U*" heading. Change kg to__kJ__in units of*C*_{v} - p. 386, Fig. 8.4-2. The vertical scales on the far right of the figure are slightly misaligned and do not reflect the fact that 1 lb = 7000 grains. The scale on the left (grains moisture/lb dry air) is more accurate. The maximum error in absolute humidity on the rightmost scale (lb moisture/lb dry air) is roughly 1%.
- p. 389, boxed set of chart values toward bottom of page, value of
*V*: Change 0.895 to 0.89__7__. - p. 410, Prob. 8.2.

Part (b), Line 2: HCN(__v__, 25^{o}C,__0.80__atm) --> HCN(__v__, 100^{o}C,__0.80__atm)

Part (c), Line 2: HCN(__v__, 25^{o}C,__50__m^{3}/kmol) --> HCN(__v__, 100^{o}C,__50__m^{3}/kmol)

Part (d), Line 2: Change 1 atm to__0.80__atm. - p. 420, Prob. 8.57(a). Change "molar" to "
__mass__" - p. 427, Prob. 8.66(b), Row 5 of spreadsheet: Change the values of A, B, and C for n-pentane to
__6.84471__,__1060.793__, and__231.541__, respectively. - p. 429, Prob. 8.67, last line before statement of Part (a): Add "The Antoine equation coefficients for propane are A=7.58163, B=1133.65, C=283.26."
- p. 457. In the expression under "Calculate Inlet Enthalpy," the integrand should be (
*C*)_{p}_{C2H5OH}*dT* - p. 458, end of Example 9.5-3: In the third line from the end of the example, change 2.879 to
__2.813__ - p. 460. In Eq. (9.5-3), change (
*n*) to (). In the line above the equation, change "__r__*n*moles of solvent" to "moles of solvent."__r__ - p. 460, second line from bottom: Delete the parentheses and the subscript from (&rDelta;
*H*_{f}^{o})_{NaOH(aq)} - p. 463.

Line 5 below the enthalpy table (in the H_{2}SO_{4}calculation): change 58.9 kJ to__57.8__kJ.

On the bottom line and 3 lines above it, change -1349 kJ/mol to -__134.9__kJ/mol.

On the bottom line, change -1375 kJ to -__136__kJ - p. 470, 4
^{th}complete paragraph, first sentence. "There exist two values of the mole percent of fuel in__a fuel-air__mixture--the lower or lean flammability limit and the upper or rich flammability limit--__that define a range within which self-sustaining combustion can occur__.*A fuel-air mixture....*" - p. 477, Prob. 9.7(d), Line 3: Change the line to read "required heat of reaction,
__use tabulated heats of fusion, which you should assume to be temperature-independent__.") - p. 479, Prob. 9.14, first paragraph. "Normal heptane is dehydrocyclized to toluene
__and hydrogen__in a continuous vapor-phase reaction. Pure heptane at 400^{o}C is fed to the reactor. The reactor operates isothermally at 400^{o}C and the reaction goes to completion.*Data:*The average heat capacity of n-heptane between 25^{o}__C and 400__^{o}__C is 0.2427 kJ/(mol -__^{ o}__C).__" - p. 480, Prob. 9.18.

Line 3: "The flowchart shown below...basis of 1 mol FeO fed__at 298K__."

Flow chart: There should be two separate feed streams--one for 1 mol FeO at 298K and the other for*n*_{o}mol CO(g) at*T*_{o}(K)

Partial spreadsheet (toward bottom of p. 481):- Row 3: Change -16480 to -16.480, and change J/mol to
__kJ__/mol- Row 7: Change 1520 to 1.520, 13482 to 13.482, and 11863 to 11.863
- p. 484, Prob. 9.24. In the sentence immediately after the two stoichiometric equations ("The reactions of ethylene...reaction system."), change "hydrogen" to
__water__(two occurrences).- p. 492, Prob. 9.38(b), Line 5: Change 51.5 to 51.
__37__.- p. 494, Prob. 9.45, Line 3: Change -1.2 kJ/mol to -
__1.17__kJ/mol- p. 494, Prob. 9.46(a), Line 3: "...pure liquid water,
__the standard heat of solution of sodium sulfate is -1.17 kJ/mol__, and the energy balance..."- p. 495, Prob. 9.50, Line 4: Change 841.9 kJ/mol to
__963.7__kJ/mol- p. 495, Prob. 9.51. In Line 2, add "Assume that the pressure is low enough for all the exiting water to be vapor."
- p. 524, Eq. (8): Change 93.3% to
__90__%, change 0.933 to 0.9__00__, and change 14.0 to__13.5__. On the 3^{rd}line down from Eq. (8), change the value of*n*_{8}from 14.0 to__13.5__.- p. 548, Example 11.2-1:

-- On the flow chart, change the flow rate of the feed stream from 0.50 m^{3}/s to 0.__0__50 m^{3}/s

-- On the first line of the solution, change ρ = 0.00100 kg/m^{3}to ρ =__1000__kg/m^{3}- p. 550, Eq. (11.2-1): Delete "(s
^{-1})"- p. 552, Example 11.2-2: On the flow chart, change the flow rates of the feed and effluent streams from 1.150 L/s to
__0__.150 L/s- p. 559.

Sentence above graph: "If you evaluate T....values of*t*__(s)__, a plot..." (lower case s in parentheses, not 5)

Last sentence on page: "It takes 3.8__seconds for__the temperature to reach 178^{o}F,..." (delete period after "seconds")- p. 583, Step 12: On Line 4, change "Step 8" to "Step
__9__"- p. 586, Prob. 12.10, Line 1: Change "mole fraction" to "
__mass__fraction."- p. 587, Prob. 12.19(d), Line 3: Change 6.5-11 to 6.5-
__5__.- p. 588, Prob. 12.26, Line 1: Change "resin neutralizer" to "
__waste liquor__neutralizer."- p. 596, Prob. 13.1, Line 5: Change SCMM to SCM
__H__.- p. 608, Eq. (A.1-2): Insert subscript
*i*next to*x*in the second summation. The term should be (*y*)_{i}- ax_{i}- b^{2}.- p. 631, Table B.1. The normal boiling point of mercury should be
__356.7__(not -356.9). The standard heat of combustion of liquid methanol should be__-726.6__(not +726.6)- p. 632, Table B.1. In the entry for Phosphorus(red), the 0(c) in the next-to-last column belongs to Phosphorus(white) at the top of the next page.
- p. 636, Table B.2: In the formula for the heat capacity of hydrogen cyanide, change the value of
*c*x 10^{8}from 1.092 to__-1.092__- pp. 638-9, Table B.3. Change the vapor pressure of water at 18.6
^{o}C from 16.771 to 16.__0__71, the vapor pressure at 33.4^{o}C from 33.584 to 3__8__.584, and the vapor pressure at 95.2^{o}C from 938.59 to__6__38.59- p. 641, Table B.4. Change 1-Nonane to 1-Non
__e__ne- p. 656, TY on p. 49, Item 5: 50
__x10__^{3}__mol__/h (not 50 kmol/h)- p. 657, TY on p. 190, Item 1: On Line 3, change 200 g/s to
__255__g/s.- p. 658, TY on p. 212, Line 1: Change 5.3-4 to
__5.4-3__- p. 658, TY on p. 253

2. 200 mm Hg;__760 mm Hg__... (not 600)- p. 661, TY on p. 445, Question 5, last line: Change the + before the first summation to an =.
- p. 663, TY on p. 618: "2. A line...plot through (2, 2.3) and (
__2.3, 2.45__)..." (not 2, 2.345). - Row 3: Change -16480 to -16.480, and change J/mol to

**Answers to selected problems (p. 665-668)**

- Prob. 2.8(b). 2.
__5__kg (not 2.6) - Prob. 2.30(d).
*xy*= 2e^{3y/x}__[can't solve explicitly for__*y*(*x*)] - Prob. 2.32(b). 1
__10__kg/h (not 109) - Prob. 3.42(a).
==>*h*= 400 cm*R*_{water}=__646 cm__ - Prob. 4.46(b).
*X*_{A}=*X*_{B}=__0.688__(not 0.496) - Prob. 4.50(c). 0.87
__7__(not 0.875) - Prob. 5.14(a). 88
__0__cm^{3}/s - Prob. 5.24(b). $1,
__747__,000/month (not 1,048,000) - Prob. 5.48(b).
*f*_{SO2}=__0.367__at 600^{o}C (not 0.602) - Prob. 6.16. 5.0
__4__x10^{4}ft^{3}/m (not 5.07) - Prob. 6.42(a). ...15.5%
__H___{2}O (not N_{2}O) - Prob. 6.52.
__86.0__^{o}C (not 85.85) - Prob. 6.54(a).
*P*=__76__psig (not 151) - Prob. 7.28(b).
__1.27 m__^{3}__/s__(not 2.09 kg/s) - Prob. 7.42(a).
__1.82__x10^{4}cal - Prob. 8.26(b). Relative humidity =
__79.7%__(not 51.2%) - Prob. 8.32(a).
__732__^{o}C (not 792) - Prob. 8.52(a). 2.
__42__x 10^{4}kW (not 2.06) - Prob. 8.74(b).
__2.9__tons of cooling (not 1.35) - Prob. 9.6(a).
__122.7__kJ/mol (not 245.4) - Prob. 9.10(b). Change -5090 kJ/mol to -
__5068__kJ/mol - Prob. 9.12(c). -0.0
__536__kW - Prob. 9.14(c). Q =
__251__kJ (not 237.3) - Prob. 9.16(
__b__) [not (c)].__1350 kW__(not 8.11x10^{4}kJ/min) - Prob. 9.18(c). Q =
__11.86__kJ (not 11,863) - Prob. 9.28(b). Delete the minus signs in front of the three heat flow rates.
- Prob. 9.30(c). 55.
__7__kmol recycled/h (not 55.9) - Prob. 9.38(c).
__35.4__mol O_{2}(not 9.0) - Prob. 9.46(a).
__94__^{o}C (not 94.5) - Prob. 9.62(a).
__119__% excess air (not 99%) - Prob. 9.64(b).
__2780__^{o}C (not 2871) - Prob. 9.66(a).
__1832__^{o}C (not 1672) - Prob. 9.70(a). Change 4.7x10
^{7}kJ/d to__1.38__x10^{7}kJ/d

**Index (p. 669-675)**

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