PChem312 f20 w8

Monday, Oct 5, 2020

cont. sec 3.1...

- Ex. Problem 3.1 - a thermometer at its limits...

Sec 3.2

Given, then derived

- U(T,V)...eq 3.16

Wednesday, Oct 7, 2020

Sec 3.3

- Ex Prob 3.2 --> internal pressure is 0 for an ideal gas.

- Joule Experiment, but failed due to thermometer sensitivity (Ex. Prob 3.2).

- Expansion of CO2 gas (paintball gun demo) - tank gets cold.

- What is the value of the internal pressure is treated as real gas using van der Waals eq. (Ex. Prob 3.4)

Thursday, Oct 8, 2020

1) Help with labeling and CO2 tank moving...

2) Calculation of ΔU_V from C_V,m

3) Hydrogenator/Carbonator demo

4) Mini-frig/Igor Demo

5) CO₂ snow demo

6) ΔU_V >> ΔU_T calculation, Ex. Prob. 3.5

7) Midterm course evaluation/email

Friday, Oct 9, 2020

cont sec 3.3...review answers from Ex. Prob 3.5

Sec 3.4

Enthalpy (H)...same treatment as Internal Energy (U)...

H(T,P) <-- best story told from this perspective.

- eq. 3.26

- dH solution provided in class...similar to 3.16 for dU, but this equation does not show up in your textbook (???), but the pressure dependent part is shown in eq 3.39.

Summary of dH dependence on T and P, take home, depends on T, but not so much P.

Sec 3.5

quick discussion