Last updated
11/12/09

This page is periodically updated as new errors are found. The date that the
error was recorded is listed at the end of each line.

Chapter 1 homework

- pg 31, homework problem 1.3, clarification. line 2, 'Calculate the T and P' should be 'Calculate the P'. (7/1/08).
- p32 problem 1.8, Second sentence. Delete "molar", i.e., "What is the volume of ..."(1/26/01)
- p32, homework problem 1.9, the temperature should be 293K instead of 293
^{o}C. (7/29/04) - p33 problem 1.15, part (d), temperature should be 180 (7/1/99).
- p33 problem 1.17, change "for water" to "for one kg of water".(3/3/00)

Chapter 2 body

- p43, 2nd line, change 2974 to 2973, third line change -914 to -913.(3/3/00)
- p54, first equation line, 2/3 of the way down the page, at the end of the line, delete the very last delta.(12/1/99)
- pg 60, eq. 2.43, right hand side should be divided by 2. (7/1/08)

Chapter 2 homework

- p78, problem P2.3 and P2.4, the answers are for a gas furnace.(7/24/01)
- p78, problem P2.8, remove the minus sign on the mass flow term (7/24/01)
- p79, problem P2.16, (a) remove minus sign on answer, (b) ANS. -0.305 (7/24/01)
- pg 80, homework problem 2.2, clarification. line 2, 'liquid at 25
^{o}C' should be 'liquid at 25^{o}C and 1 bar' (7/1/08) - p85, problem 2.28, wording isn't clear enough. The depressurization of the tank from 2 bar to 1.5 bar occurs slowly so that the tank is isothermal, and after movement of the piston/cylinder starts, the piston/cylinder is isothermal and isobaric at 1.5 bar.(9/22/99)

Chapter 3 body

- pg 109, eq. 3.33, remove the minus sign from
*W*, since the heat transfer terms are based on the reservoirs (2/4/06)._{S,net} - pg 109, third line from the bottom of the page, the first equality should be D
__S__= integral(d__Q__/T). (3/8/05) - p126, 6th line of example 3.12, Sdot(gen) should be underlined.(3/3/00)
- p127, Example 3.13, lines 2-5 of solution, the words "S-balance" follow the two S-balance equation lines but should precede them.(9/22/99)

Chapter 3 homework

- p 130 problem P3.1 (a), for answer, replace M with N. (7/24/01)
- p 130 problem P3.5 Cp is to be used in the problem, (ANS. 1.07 kJ/kgK).(7/24/01)
- p 132 problem 3.7, parts (a) and (b), the problem should ask for the
*intensive*entopy change. (7/1/99) - p 136 problem 3.29, part (b), change "a "reversible" heat exchanger" to "a reversible heat transfer device.(3/3/00)

Chapter 4 body

- p148, Figure 4.6, three more pumps should be in the feedwater line between the existing pump and the boiler, one for each pressure rise.(5/26/99)
- p159, Example 4.8, third (ig) equation is missing minus,
-W
_{S,net}= . (4/26/99) - pg 160 - Example 4.9. The first equation of the solution is for combustion, so the subscript on the work term should be 'comb' instead of 'comp'. Also, signs were inadvertently reversed in transitioning from the second to third equality in the line above eq 4.9. Therefore, the signs should be changed on the third and fourth equality of the line above eq. 4.9. Within the curly brakets for eq. 4.9, the second term sign should be changed, or alternatively, the terms in the denominator should be reversed. An updated pdf of the page is available; click here. Also, an updated example is available describing the steps in more detail; click here.(12/19/04).

Chapter 4 homework

- p166, problem 4.3, the pump is 79% efficient. (7/1/99)
- p167, problem 4.4, eliminate part (d).(3/3/00)
- p 167, problem 4.7, eliminate part (d). (7/18/08)
- p168, problem 4.11, 4th line, change "efficiency of 80%" to "efficiency of 80% (each stage)". (3/3/00)
- p169, problem 4.13, first line change "reversible for the purposes of the problem." to "80% efficient". (3/3/00)
- p169, problem 4.16, T
_{C}= 973 K.(4/26/99) - p169, problem 4.16, 7th line, change "net power" to "net work". (3/3/00)
- p170, problem 4.17, T
_{D}= 973 K, T_{F}= 563 K.(4/26/99) - p170, problem 4.17, 6th line, change "net power" to "net work". (3/3/00)

Chapter 5 body

- p 175, The fact that eqn 5.4 can be generalized to non-reversible processes isn't made clear. The wording surrounding the equation has been improved. Here is a pdf version of a revised pg 175. (4/13/01)
- p176, paragraph starting "Often...", in the first and second sentence replace "energy" with "internal energy".(5/20/99)
- p 178, Eqn 5.12, the value of the second derivative should be infinity. (9/22/04)
- p183, example 5.4, second (ig) equation, the differential operator is missing on the rightmost term, = CpdlnT - RdlnP.(4/26/99)
- p183, example 5.5, 2nd equation line of solution is missing a differential operator in the rightmost equation, = CpdlnT - RdlnP -bdP.(4/26/99)
- p184, Example 5.6, The second equation line from end of example, first equation
missing subscript V on partial derivative, (dT/dS)
_{V}= T/C_{V}. The second equation is missing a minus sign and should read (dT/dV)_{S}= -(dT/dS)_{V}(dS/dV)_{T}. (7/3/00)

Chapter 5 homework

- p190, problem 5.1, eliminate part (i) as it is the same as (f). (3/3/00)
- p191, problem 5.6(d), for CS2, the first two data columns should be MW=76.14 and rho=1.258 g/cm
^{3}. The other data in that row are fine. (2/20/02) - pg 192, homework problem 5.10, typos. 'follwing it terms' should be 'following in terms' (7/1/08)

Chapter 6 body

- p204, Eqn. 6.18, right hand side should have minus sign.(9/27/99)
- p206, near bottom of page, step 4, replace Z
_{now}with Z_{new}.(9/22/99) - p218, four lines below Eqn 6.42 should reference Appendix B instead of C.(12/1/99)
- p218, Eqn 6.43, P and g should have superscript HS.(12/1/99)
- p219, Eqn 6.47, lower limit of integral should be 1
^{+}.(12/1/99)

Chapter 6 homework

- p 221, problem P6.2, ANS 1.14, 0.25 g/cm
^{3}(7/24/01)

Chapter 7 body

- p239, middle of page, two lines after 'Now if we rearrage...', the gas constant
was omitted in three places:

DS = Cvln(T_{2}/T_{1}) + R ln (V_{2}/V_{1}) +**R**ln [(1-ar_{2})/(1-ar_{1})]

=**R**ln (1-ar_{2}) + Cvln(T_{2}/T_{1}) + R ln (V_{2}/V_{1}) -**R**ln (1-ar_{1}). (3/19/02)

- p245, Eqn 7.40, last term, superscript ig should be on second S in parenthesis,
e.g. (S-S
^{ig}) (3/25/99)

Chapter 7 homework

- problem 7.9, fluid is n-butane, for vapor state use 353 K instead of 352K.(9/22/99)
- p252, problem 7.17, third line. Calculate the extensive change in U (underline U). (7/1/08)
- problem 7.32, second line should reference Eqn 6.26. (12/1/99)

Chapter 9 body

- p290, under heading 'Chemical Potential of a Pure Fluid', first line, change 'specific Gibbs' to 'molar Gibbs' (7/1/08)
- p302, Table 9.2, the criteria for FL should equal zero.(7/1/99)
- p304, first line, end of line, change
*x*to_{i}*y*to give "multiply Eqn. 9.57 by_{i}*K*to obtain_{i}*y*". (3/10/06)_{i} - p304, Eqn 9.59, term after first equals sign should have plus instead of
minus, e.g., (x
_{1}-y_{1})**+**(x_{2}-y_{2}) (3/25/99) - p315, Practice problem P9.3, change 353K to 365.9K.(10/29/01)

Chapter 9 homework

- p316, problem 9.7, next-to-last line for first paragraph should read "The LFL for ethanol is 4.3%, and for propanol, 2.0%. (9/22/99)

Chapter 10 body

- p320, Eqn 10.1 and 10.2, although there is no technical problem using x as a composition variable, the next printing will use y to be less confusing for an introductory text.(4/26/99)
- p321, Eqn 10.7, T should have subscript c12, i.e. T
_{c12}. (3/29/99) - p321, Example 10.1, in the formula for the molar volume of an ideal solution 3 lines from the bottom, x will be replaced by y in the next printing to be less confusing in an introductory text.(11/08/99)
- p324, Section 10.2, first word of section should be "In".(4/26/99)
- p 328, bottom of page, numerical calulation of vapor fugacity coefficient for 1; there is an extra set of parantheses in the ln term. 2nd line from bottom.Rremove the '(' immediately after ln, 3rd line from bottom remove the final ')'. (11/12/09)
- p 328, second line from bottom, replace 0.9686 with 0.09686. (11/12/09)
- p 329, top of page, numerical calulation of vapor fugacity coefficient for 2; there is an extra set of parantheses in the ln term. Remove the '(' immediately after ln, and remove the final ')'. (11/12/09)
- p330, Eqn. 10.26, both sides of eqn, wrong subscript in denominator, replace i with k. (9/22/99)
- p336, Fig. 10.2, for the outer loop, only normalization is done. The text examples use only the outer loop. This will be clarified in the next printing.(9/22/99)
- p341, Fig 10.4, envelope labeled "Ideal Solution", should be labeled "Shortcut K-ratio".(3/25/99)

Chapter 10 homework

- p352, problem 10.33, replace "residual enthalpy" with "enthalpy departure".(7/1/99)
- p352, problem 10.34, the exit pressure should be 1.013 bar.(7/1/99)

Chapter 11 body

- p369, Eqn 11.27, G
^{E}and U^{E}should be divided by RT, as in G^{E}/RT and U^{E}/RT. (11/3/03). - p373, Example 11.8, in the line using summation notation about 2" from bottom
of page, the y's on the righthand side should be gammas, i.e., S x
_{i}g_{i}P_{i}^{sat}. (5/3/99) - p374, Example 11.8, in the line using summation notation about 2" from top
margin, the y's on the righthand side should be gammas, i.e., S x
_{i}g_{i}P_{i}^{sat}. (5/3/99) - p381, 3rd line, replace "larger that l" with "larger than l".(9/22/99)
- p388, Lamda21 should be 0.629 instead of 0.625 which changes some of the intermediate numbers, but doesn't change the final answer.(12/1/99)
- p388, Eqn 11.91, replace Nc
_{j}with z. (12/1/99) - p397, Example 11.15, the second line of the section labelled 'Solution' refers to Eqn 11.90. The reference should be to Eqn. 11.95. (10/20/04)
- p406 and 407, Eqns 11.124, 11.125, and 11.126 all need a minus sign on the righthand side.(12/1/99)
- p409, four lines above figure, the inline equation subscripts should be
corrected to read N
_{A}(e_{12}- e_{22})/RT < -0.4.(12/1/99)

Chapter 11 homework

- p 411, problem P11.2, replace L
_{ox}with W_{xo}.(7/24/01) - p413, problem 11.6 (a), (b), temperature is incorrect, use 50C, for parts (c), (d), mmhg should be mmHg. (5/3/99).
- p415, problem 11.14(a), subscript E is for ethanol.(9/22/99)
- pg 418, problem 11.30, 5th line, delete "/P" and replace with "x
_{i}" (4/13/01) - p421, problem 11.41(c), should reference Eqn. 11.79 instead of 11.80.(12/1/99)

Chapter 12 body

- p 426, second line of text where the lever rule is applied, the numbers in the numerator refer to the wrong segment, delete (0.5 - 0.07) and insert (0.93 - 0.5). (5/4/05)
- p427, Example 12.2, delete the ln operator in the 4th to last line of the
example, which should read g
_{A}^{a}= 10^{8.4}.(12/1/99) - p436, Example 12.6, 9 lines above end, spelling of Scatchard.(9/22/99)

Chapter 12 homework

- p440, Problem 12.5, the bubble pressure should be 1.013 bar, the vapor pressures should be 0.776 bar and 0.383 bar, respectively.(5/28/99)
- pg443, problem 12.19, second line, plot vs. F
_{2}^{a},F_{2}^{b}instead of x.(12/1/99)

Chapter 13 body

- p471, Footnote, Wahn Schafft should be Wahnschafft.(9/22/99)
- p473, Figure 13.16, process schematic, look at the decanter. Stream R2 should be coming from the top (organic) phase and stream R1 should be coming from the bottom (aqueous) phase. (4/16/03).

Chapter 13 homework

- pg 477, problem 13.9 (c), the molar volumes for the liquid and solid are switched. (7/1/99).

Chapter 14 body

- pg487, last line of page, replace 70,790 with 70,240.(12/1/99)
- p493, line below Eqn. 14.30, replace "by plugging in I = 298.15" with "by plugging in T = 298.15".(9/22/99)
- p495, Eqn 14.31, The center argument should read -DG
_{T}^{o}/RT + DG_{R}^{o}/RT_{R}.(8/14/00) - p 498, Example 14.7, In the equation line just above 'Basis:', the equation
for Ka is missing a subscript for the mole fraction of hydrogen, and should
read PK
_{a}= y_{NH3}/ [(y_{N2})(y_{H2})^{3}]^{1/2}. (4/25/02) - p512, top of page, CO row of stoichiometry table, last column is missing
subscript, should be "2 - x
_{1}".(9/22/99) - p517, Eqn 14.51, replace "ln" with "log
_{10"}and add minus sign to right hand side of equation. (4/13/01) - p527, problem 14.18 (b). clarification, the pressure is to be 1 bar.(7/1/08)

Chapter 15 body

- p 537-542, Sections 15.4 and 15.5, the
*K*_{i}'s are equilibruim constants and should be written as*K*_{a,i}'s to be consistent with notation for equilibrium constants elsewhere and to avoid confusion with the VLE K-ratio.(12/02/99) - p 540, last line of Example 15.2, remove caret on j
_{A}.(9/22/99) - p 540, Example 15.3, five lines up from bottom of page, z
_{A}should be x_{AM }and z_{B}should be x_{BM}.(12/1/99) - p 541, Fig 15.5, the z's in the left figure are true mole fractions, x
_{AM}, x_{BM}, x_{AB}, and x_{A2B}.(12/1/99) - p 551, first line, replace "modes" with "moles".(9/22/99)
- p 567, Eqn 15.120, include Nd
_{j}as a product within the sum. (4/13/01)

Chapter 15 homework

- pg 538, Eqn 15.24, change the
*x*to*y*in both places. (7/1/08) - pg 542, Eqn 15.30, change the
*x*to*y*in both places. (7/1/08) - pg 574, problem 15.4, minus sign missing, should read G
^{E}= -0.91 kJ/mol.(4/2/99) - pg 574, problem 15.7, table, the X's in the header row should be lowercase.(4/2/99)
- pg 575, problem 15.9, greek alpha is missing in the second equation and the Gibbs energy of formation should not be underlined, =RTSn
_{i}lnx_{i}a_{i}+ S n_{i}DG^{o}_{f,i}.(4/2/99)

Appendices

- p 602, Eqn B.25, alignment of first line is off, should read for q<0,
where q = 4ac-b
^{2}. (4/26/99) - g 602, Eqn B.25, in the argument of arctan, replace 2
*ax*+*b*with 2*cx*+*b*. (5/19/08) - p627, 6th line of Example D.1, replace "is mixed each" with "is mixed with each".(9/22/99)

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*Copyright © 2000-2003, Carl T. Lira, J. Richard Elliott. All rights reserved.*