1. As always… OWL Lon-Capa assignments Lecture videos Textbook
HW due tonight
Quiz this weekend
Lecture videos
Textbook
Read
Do text homework
Video for Wednesday (10/18): Reversible Processes

2. Clicker Question
Is the “pop bottle reaction” spontaneous or not spontaneous?
a) Spontaneous
b) Not spontaneous

3. How to Think About Entropy
Entropy is related to heat/temperature.
ΔS = qrev/T
Entropy as “disorder”.
S = k●logW

4. Temperature: measure of KEavg

5. From the videos and text…
…show how probability plays into all of this.
…show that thermal equilibrium is preferred when two bodies of different temperatures are put in contact with one another.
…see why entropy is related to the logarithm of the number of configurations or microstates.
…discuss what “reversible” means when we say the change is entropy equals qrev/T?

6. Microstate fraction vs. mole fraction

7. Clicker Question
The following chemical reaction is exothermic: A2 + B2  2AB. This means:
more stable higher average bond energies
a) Reactants Reactants
b) Reactants Products
c) Products Products
d) Products Reactants
e) I do not know.