1. Warm-up (12/7) Worksheet 10 and Lab 7 out!
A gas has a density of 1.65 g dm-3 at 27°C and 92.0 kPa. What is its molar mass?
First, assume 1 L of gas, and solve for moles of gas using PV=nRT. Then, Molar mass = g/mol = 44.7 g/mol

2. Results Lab 7? Error Analysis?

3. Go over WS Homework
I assume you have done end of chapter problems 3, 4, 17, 19, and 23. Keys on Moodle.

4. Mini-lab syringes for real gases
Pre-lab: Sketch the ideal gas plot of pressure versus volume
Mini-lab:
Materials: Computer, Lab Quest, Gas Pressure Sensor
Starting at 3mL, take pressure readings every 2mL until 19 mL
Then graph your results (line with the points) in Logger Pro or Google Sheets

5. Mini-Lab: Real vs Ideal Gases
QUESTIONS (in lab book): What is the shape of the graph? Why is the shape of the graph not as you expected? THINK CAREFULLY!

6. Quiz time! (25 minutes) PV = nRT STP = 100 kPa and 273 K
R = L atm/mol K
= L kPa/mol K
K = C + 273
kPa = 1 atm = 760 Torr or mmHg

7. Homework Day 11
Read book pages: (ideal vs real gas) – really, make sure you’ve read the whole chapter!
Finish mini-lab graph and post-lab question
START REVIEWING UNIT 1 and 2!!
I have given you a Unit 2 Practice Test – use it!
We have two more classes until the exam
TUESDAY – wrap up gases unit, and review Unit 2 (WS, practice test questions, quiz corrections)
THURSDAY – last quiz on ideal gases (correct before we go), practice problems Unit 1 for review and discussion
REVIEW SESSION Wednesday (20th) before exam – a mini mock-exam and discussion
EXAM: Thursday, December 21st, 2nd exam