ChE 312
Chemical Engineering Thermodynamics

Winter 2019

Lecture: MWF 10-10:50  210 LINC
Studio: R Afternoon; BXL 102 or 103

Name email Office Hours
Lead Instructors Milo Koretsky (MK) Gleeson 200 Tu 4-6 PM
Kostas Goulas  Gleeson 200 W 2-4 PM
Teaching Assistants Fuqiong Lei Gleeson 200 Tu 4-6 PM
Marjan Khorshidi Zadeh Gleeson 200 W 2-4 PM
  Ryan Cashen
Mark Li

AIChE Concept Warehouse

The general syllabus for course is available here.


Page Contents



  1. HW8, Q1 clarification: please calculate the composition at the outlet of Reactor 2 and explain why you do not need to calculate the outlet composition of Reactor 1 to do this.
  2. Some Practice Problems to prepare for the Final Exam:
    Examples 8.1, 8.2, 8.3, 8.5, 8.7, 8.12, 8.19
    Problems 8.1, 8.2, 8.3, 8.6, 8.10, 8.29, 8.30, 8.44, 8.73
    Examples 9.1, 9.2, 9.3, [9.4 (a), (b) part (i)], 9.5, 9.6, [9.7 part (a)], 9.8, 9.9, 9.10, 9.11
    Problems 9.1, 9.7, 9.10, 9.20, 9.21, 9.23, 9.24, 9.29, 9.32, 9.33
  3. HW 8 solutions posted (3/17)
  4. Week 10 notes for M and W posted (3/14)
  5. Finals week office hours: T 3-5 (GLSN 200); W 10-12 (GLSN 100)
  6. A link to the Knovel handbook presented in class W week 10 is available here.
  7. There is an error in Equation 9.28 of the text where xiyi should read xiγi.
  8. The spreadsheet for Studio 10 is here
  9. HW 8 has been posted (3/9)
  10. Please bring a laptop to Studio 9
  11. HW 7 due date changed to Friday March 8 at 5 PM (3/5)
  12. HW 7 posted (2/27)
  13. Notes through Week 7 posted (2/24)
  14. HW 6 sln posted (2/24)
  15. Chapter 7 Practice Problems: 
    Conceptual: 7.2, 7.5, 7.6, 7.7, 7.9, 7.10
    Numerical: 7.15, 7.32, 7.42, 7.55, 7.66, 7.67
  16. HW 6 due date extended until Friday 2/22 at 5 PM (2/20)
  17. HW 5 sln posted (2/20)
  18. HW 4 sln posted (2/20)
  19. Lecture slides for fugacity for the vapor phase are posted in week 6 Lecture Slides (02/12)
  20. HW 5 posted (02/06)
  21. A paper regarding the shift in Mayra's learning is here
  22. HW 4 posted (01/30)
  23. There was a sign error in the posted solution to 6.57. That has been corrected. (6 PM 1/29)
  24. Week 3 and Week 4 Lecture Notes posted (1/28)
  25. HW 3 Solutions posted (1/28)
  26. Week 2 Lecture Notes posted (1/28)
  27. HW 3 due date changed until 01/28 at 10 AM (01/23)
  28. HW 3 posted (01/18)
  29. HW 2 Solutions posted (1/17)
  30. Week 1 Muddiest / Suprised points are here.
  31. Please bring your laptop to Studio in Week 2 (1/14)
  32. Week 1 Lecture Notes posted (1/11)
  33. Homework #2 Posted (1/11)
  34. Jamil found another vacuum video here
  35. HW 1 Solutions posted (1/11)
  36. You can find your GTA here (1/8).
  37. You should now have access to Gradescope. Please use the School Credentials tab to log on (1/8).
  38.  Homework #1 Posted. (12/31)
  39. Welcome to ChE 312 :)

Weekly Assignments

Week Topic Pre-Lecture
(Complete Quiz on Concept Warehouse)
(Due Thursday by 1 PM)
HW Solution Lecture Slides Topics Covered
Week 1 Review
Pure Species Equilibrium
Before W lecture: Textbook, pages 16-17, 20-24
Before F lecture: Textbook, pages 315-321
HW#1 HW#1Sln Week 1

M:    Introduction; Psat vs. T for a pure substance

W:    Scientific reasoning; Vacuum  video

F:      Models and modeling: Vacuum; home heating; outdoor pizza oven

Week 2 Pure Species Equilibrium
W: Textbook, pages: 321-329
F:  Textbook, pages: 334-344
HW#2 HW#2Sln Week 2

M:    Gibbs Energy as combined first and second laws; criteria for chemical equilibrium of a pure specties; Muddiest/Surprised Points

W:   Clayperon and Clausius Clayperon equations

F:    Introduction to  mixtures;  etropy change of mixing  for an ideal gas; partial molar properties
Week 3 Mixtures M: MLK Holiday
W: Textbook, pages: 344-347, 355
F: Textbook, pages: 357-359, 367-36
(Due 1.28 by 10 AM)
HW#3Sln Week 3

M: Martin Luther King Jr. Day

W:   Nomenclature of mixtures; physical explanation of partial molar volume and enthalpy

F:    Partial  molar  properties: experimental and analytical determination
Week 4 Chemical Potential
M: Review Chapter 6
W: Exam 1
F: Textbook, pages: 391-402 
No HW Week 4

M:  Gibbs-Duhem Equation; Review

W:   Exam 1 (individual)

F:    Criteria  for chemical equilium in mixtures
 Week 5 Fugacity in the vapor M:
W: Work through Examples 7.1, 7.2, 7.3
F:  Graphic text on fugacity p 1-4
Elby Paper
HW#4 Sln Week 5

M: Introduction to fugacity

W:  Fugacity in pure vapor: steam tables & vdW EOS

F:    Review Studio 5; fugacity of pure species
Week 6 Fugacity in  vapor mixtures
Fugacity in the liquid
M: Textbook, pages: 403-414, Example 7.4
W: Textbook, pages: 414-418
F:  Textbook, pages: 425-436
HW#5 HW#5 Sln Week 6

M:  Fugacity  of vapor mixtures; generalized correlations

W:  Ideal solutions; Lewis / Randall and Henry's law reference states

F:   Review of Studio 6; fugacity of pure liquids; excess properties

Week 7 Fugacity in the liquid, solid M: Textbook, pages: 419-420, 436-441, 449
W: Textbook pages 450-452; Graphic text on             fugacity p 5-8
F:  No Reading
Text: 7.56, 7.57, 7.60 and 7.62 HW#6 Sln Week 7
Three-suffix Margules - gammas

M:  Two-suffix Margules equation

W:  Assymetric  models for gE - historical development
F:    Intro  to phase diagrams; lever rules
Week 8 Missed due to snow M: Textbook pages 467-484
W: Exam 2 
F:  Textbook pages 484-486, 495-500

M:  SNOW (no class)

W:   SNOW (Exam 2 postponed)

F:     Exam 2 (individual)
Week 9 Phase Equilibria: VLE, LLE and SLE
M: Textbook pages 511-515, 523-531
W: Textbook pages 563-568
F:  Textbook pages 579-580, 586
HW#7 HW#7 Sln Week 9

M: Fitting Models for gE

W:   VLE; Deviations from Raoult's Law; azeotropes

F:    Bubble point and dew point calculations;  LLE, , SLE  (salt  CW question)
Week 10 Chemical Reaction Equilibria M: Textbook pages 599-602
HW#8 HW#8 Sln Week 10

M: Introduction to Chemical Reaction Equilibrium: enthalpy, entropy, and Gibbs energy

W:   Formal development of expression for K; relation to T and stoichiometry

F:    Dependence of  lnK on  T

Homework assignments are to be turned in at the beginning of class on the due date.


Old Exams

Old exams are avaiilable here for you to practice: 

Exams 1 and 2 from 2017 and 2018 are  available on the links below.  One point of note.  The emphasis on which content we are covering is different this year, so the exam emphasis will also change.

Exam 1

Exam 1 2017

Exam 1 2018

Exam 2

Exam 2 2017

Exam 2 2018


Lecture Handouts

Lecture handouts will be archived here in PDF format.


Course Learning Objectives

By the end of this course, you will be able to:

  1. Pure species phase equilibrium:
    Describe the role of Gibbs energy in determining pure species phase equilibrium.  
    Apply the Clapeyron equation to relate T and P between two states of a pure species in phase equilibrium. State when you can simplify the Clapeyron equation to the Clausius-Clapeyron equation.
    [CBEE 211 & ChE 311] Apply the first law to systems which undergo a phase change.
  2. Thermodynamics of mixtures:
    Apply thermodynamics to mixtures by defining and finding values for pure species properties, total solution properties, partial molar properties, and property changes of mixing.
    Explain enthalpy and entropy of mixing in physical terms.
  3. Fugacity
    Explain how fugacity relates to partial molar Gibbs energy (chemical potential) and why we use it.
    Define fugacity. Explain the role of the reference state (and that T0=T)
  4. Fugacity in the vapor phase: 
    Calculate fugacity and fugacity coefficient for a pure species i using tables, EOS, and generalized correlations.  Identify appropriate data and reference state
    Calculate fugacity and fugacity coefficient for a species i in a mixture using EOS
    Describe the Lewis and ideal gas approximations for fugacity of i in a mixture. Provide physical explanations for the fugacity coefficient
  5. Fugacity in the liquid phase:
    Explain why we choose the ideal solution as a reference state for a liquid. Explain the molecular origin and calculate reference fugacities based on the Lewis/Randall and Henry’s reference states. Identify the "shift" in curves of ln(gamma,i).
    Identify when like or unlike interactions are stronger. Know when the Lewis/Randall reference state equals the saturation pressure and how to correct when it does not.
    Define gE and explain why we use it. Given a model for gE determing an expression for gi. Calculate gi.
  6. Phase Equilibrium:
    Solve phase equilibria problems for Vapor-Liquid equilibria (VLE), Liquid-Liquid equilibria (LLE).
    Identify and solve problems for systems containing azeotropes (VLE) and partially miscible solutions (LLE). Explain what causes each.
    Describe how phase diagrams are constructed. When given any phase diagram, an overall composition, and T or P determine what phase or phases are present. When two phases are present determine their composition and how many total moles are in each phase.
  7. Chemical Reaction Equilibrium:
    Distinguish between reaction rate and reaction equilibrium in a chemically reacting system
    Use thermochemical data to determine the equilibrium composition for a chemical reaction. Calculate the equilibrium constant at different temperatures.
    Determine the equilibrium composition for a system with a single reaction or multiple chemical reactions in a single phase or for heterogeneous reactions



Sec Day/Time/Date Location Curr Instructor
1 MWF 1000-1050 LINC 210 103 Milo Koretsky
Kostas Goulas
11 R 1300-1350 BEXL 102 21 Fuqiong Lei
Ryan Cashen
12 R 1300-1350 BEXL 103 21 Marjan Khorshidi Zadeh
Mark Li
13 R 1400-1450 BEXL 102 21 Fuqiong Lei
Ryan Cashen
14 R 1400-1450 BEXL 103 21 Marjan Khorshidi Zadeh
Mark Li
15 R 1500-1550 BEXL 102 19 Ryan Cashen
Mark Li