1. As always… OWL Lon-Capa assignments Lecture videos Textbook
HW: equilibrium (due Monday)
Quiz: Mon-Wed this week
Lecture videos
Textbook
Read
Do text homework

2. Exam I Thursday, September 27, 7:00-9:00 pm; rooms are on the website.
Conflict: (9/27) 4:30-6:30pm in 219 Greg; sign up in 1026 CA
Conflict with conflict? me right away.
Review sessions:
Monday (9/24): 160 English Building (6-8 pm)
Tuesday (9/25): 259 English Building (6-8 pm)

3. Exam I Practice exam is now posted.
Take when you feel ready for the exam.
Take as an actual exam (not just more practice problems).
See the front of the exam for information that you are given and the number of problems.

4. Chapter 6: Challenge Problem

5. Clicker Question
Consider a gas-phase reaction (that is, all species are gases) that has reached equilibrium. To this system we add an inert gas (such as helium) at constant temperature. Which of the following best describes what happens?
a) There is no shift because adding an inert gas does not shift the equilibrium position.
b) If the system is at constant volume and K = Kp, then the equilibrium position will shift.
c) If the system is at constant volume and K ≠ Kp, then the equilibrium position will shift.
d) If the system is at constant pressure and K = Kp, then the equilibrium position will shift.
e) If the system is at constant pressure and K ≠ Kp, then the equilibrium position will shift.

6. Reaction Quotient (Q)

7. Follow Up Question
Explain your answer. As part of your explanation provide an example of a chemical equation in which K = Kp, and an example of a chemical equation in which K ≠ Kp and justify your choices. Full credit is reserved for explanations that address all of the conditions given in part a, that use the actual (real) chemical equations, and that correctly incorporate partial pressures (and/or partial concentrations) of reactants and products.