Warm-up (10/23) Lab 6 in lab book – bring to my desk NOW!

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Presentation transcript:

Warm-up (10/23) Lab 6 in lab book – bring to my desk NOW! Make sure your results are in the Google Doc I sent you this weekend (if not, get them in before we start class) QUIZ TIME – 25 min! Calculator and pencil only out!

Quiz time (20 min) PV = nRT R = 0.08206 L atm/mol K OR 8.314 L kPa/mol K K = C + 273 STP = 1.00 atm and 273 K 101.325 kPa = 1 atm = 760 Torr or mmHg

Lab 6 Analysis We were FAR OFF!! WHY? Here are your correct answers: D = On your lab (or lab book) somewhere, write your “real answer” and pick one source of error that matches the best with your observations and results

Mini- Lab 7a: Real vs Ideal Gases! In your Lab book (pre-lab), sketch the graph of the pressure and volume relationship Make sure your axes are correct and labeled! Now one person, grab out your laptop (one per pair) and open up Google sheets or Logger Pro The other person: come get Lab Quest and gas pressure sensor

Mini-Lab 7a: Real vs Ideal Gases! Open syringe to EXACTLY 3 mL, and THEN attach to the gas sensor Record pressure and volume directly on your computer for: 3, 5, 7, 9, 11, 13, 15, 17, and 19 mL. NEVER LET IT GO. Hold it steadily! Three trials!

Mini-Lab 7a: Real vs Ideal Gases Processing: Calculate the average pressure of the three trials using the functions of the spreadsheet Graph Pressure VS Volume with a line graph (show the dots and and label axes and title it). Leave space to paste the graph (at home) QUESTIONS (in lab book): What is the shape of the graph? Why is the shape of the graph not as you expected? THINK CAREFULLY!

Homework Day 5 Webassign #2 due Wednesday at 8am Lab 7a finish: post-lab questions and graph/data table should be taped in your lab book for next class! Webassign #2 due Wednesday at 8am We have covered sections 5.1-5.9 in the book – READ IT to help review and solidify the new stuff! Unit 2 Practice Test for YOUR BENEFIT NMSI study notes on Moodle as well! Test is Friday this week! Fun lab Wednesday and Wrapping up content in class – bring qs about practice test then!