ChE 312
Chemical Engineering Thermodynamics

Winter 2020

Lecture: MWF 10-10:50  Wiegand Hall 115
Studio: R Afternoon; BXL 102 or 103

Name email Office Hours
Lead Instructor Milo Koretsky (MK) Gleeson 200 Tu 4-6 PM
Teaching Assistants Fuqiong Lei Gleeson 306 W 4-6 PM
Marjan Khorshidi Zadehkhorshim@oregonstate.eduGleeson 200 Tu 4-6 PM
Casey Kanalos Gleeson 200 W 2:30 -4 PM
Learning Assistants Shayne Sensenbach  Gleeson 200 W 2:30 -4 PM
Joe Gleeson 200 Tu 4-6 PM
Jake Young Gleeson 306 W 4-6 PM

AIChE Concept Warehouse

The general syllabus for course is available here.


Page Contents



  1. HW 8 solutions posted (03/14)
  2. Concept Warehouse questions posted here
  3. Last day (Zoom) slides posted
  4. 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.
  5. HW 7 solutions posted (03/10)
  6. 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
  7. Studio 10 excel file is posted here
  8. Week 10 notes posted (3/09)
  9. HW 8 Posted (3/06)
  10. Weeks 8 and 9 notes posted (3/06)
  11. The speadsheet for the classs example W9_W is posted here
  12. HW 7 due date extended until Friday at 5 PM (3/02)
  13. HW 7 Posted (2/26)
  14. CW questions available here (2/24)
  15. HW 5 and 6 solutions posted (2/22)
  16. Week 7 notes posted (2/21)
  17. A draft of the equations to be provided in Exam 2 is available here
  18. A typo in HW 6, problem 3 has been corrected (2/18)
  19. Exam 2 from 2018 and 2019 have been posted for you to practice (2/14)
  20. Friday HW 6 has been posted. Due date is moved to 2/21 at 5 PM (2/13)
  21. Week 6 notes posted (2/13)
  22. HW 5 notes:
    1. For Text 7.47 part b - determine the fugacity coefficient of species 1 in the mixture "phi 1 hat:"
    2. For Problem 2 part b; calculate the pressure using the Lewis fugacity rule.
  23. HW 5 due date has been moved back to Friday at 5 PM (2/10)
  24. HW 5 correction: Problem 1 is  Text 7.47
  25. Gradescope HW submission guidelines:
  26. HW 5 posted (2/06)
  27. HW 4 solutions posted (2/06)
  28. Week 4 notes posted. These notes also contain content about pure species fugacity that we will discuss next week. (1/31)
  29. There is no class on Monday Feb 3. Please complete the following Lecture replacement activity; the paper to read is the Elby Paper
  30. HW 4 posted (1/30)
  31. HW 3 solutions posted (1/25)
  32. Week 3 notes posted (1/25)
  33. A draft of the equations to be provided in Exam 1 (and exam guidelines) is available here
  34. HW 3 due date has been moved back to Friday at 5 PM (1/23)
  35. HW 3 Q3 has been corrected (1/17)
  36. Office hours updated (1/17)
  37. Week 2 notes posted (1/17)
  38. Homework #3 Posted (1/16)
  39. Exam 1 from 2018 and 2019 are posted (1/16)
  40. Week 1 surprised/muddy points available here
  41. Week 1 notes posted (1/10)
  42. Homework #2 Posted. (1/9)
  43. Papers about technology and multitasking are available herehere, and here (1/6).
  44. You should now have access to Gradescope. Please use the School Credentials tab to log on (1/4).
  45. Homework #1 Posted. (12/31)
  46. 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
Week 1

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

W:    Scientific reasoning; Vacuum  video

F:      Equilibrium and dynamic processes; phase equilibrium and Gibbs energy

Week 2 Pure Species Equilibrium
W: Textbook, pages: 321-329
F:  Textbook, pages: 334-344
HW#2 HW2 sln 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, 367-369
(Due Friday 5 PM)
HW3 sln 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 
Week 4

M:  Review

W:   Exam 1 (individual)

F:    Criteria  for chemical equilium in mixtures
 Week 5 Fugacity in the vapor M: Work through Examples 7.1, 7.2, 7.3
Lecture replacement activity; Elby Paper
W: Graphic text on fugacity p 1-4
HW#4 HW4 sln See
Week 4

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
(Due Friday 5 PM)
HW5 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
(Due Friday 5 PM)
HW6 sln Week 7

M:  Two-suffix Margules equation

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

M:   Fitting Models for gE

W:   Exam 2 (individual)

F:    VLE; Deviations from Raoult's Law; azeotropes
Week 9 Phase Equilibria: LLE and SLE
Chemical Reaction Equilibria
M: Textbook pages 511-515, 523-531
W: Textbook pages 563-568
F:  Textbook pages 579-580, 586
(Due Friday 5 PM)
HW7 sln Weeks 8 and 9

M:   Bubble point and dew point calculations 

W:   LLE, , SLE  (salt  CW question). Introduction to Chemical Reaction Equilibrium: enthalpy, entropy, and Gibbs energy
F:  Formal development of expression for K; relation to T and stoichiometry
Week 10 Chemical Reaction Equilibria M: Textbook pages 599-602
(Due Friday 5 PM)
HW8 sln Week 10
Zoom slides

M:   Dependence of  lnK on  T

W:    Multiple reations
F:  Review  and reflect

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 2018 and 2019 are  available on the links below. One point of note. The emphasis on which content we are covering is different each year, so the exam emphasis will also change.

Exam 1

Exam 1 2018

Exam 1 2019

Exam 2

Exam 2 2018

Exam 2 2019


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 210 144 Milo Koretsky
11 R 1300-1350 BEXL 102 24 Marjan Khorshidi Zadeh
Jake Young
12 R 1300-1350 BEXL 103 24 Casey Kanalos
Joe Johnson
13 R 1400-1450 BEXL 102 24 Marjan Khorshidi Zadeh
Jake Young
14 R 1400-1450 BEXL 103 24 Fuqiong Lei
Shayne Sensenbach
16R 1500-1550BEXL 10324Fuqiong Lei
Shayne Sensenbach
18 R 1600-1650 BEXL 103 24 Casey Kanalos
Joe Johnson