Unit1Day2-Crawford Tuesday, September 03, 2013 7:51 AM Vanden Bout/LaBrake/Crawford CH301 GAS PRESSURE/ Day 2 CH302 Vanden Bout/LaBrake Spring 2012 Important Information USE PIAZZA FOR QUESTIONS…….. LEARN ABOUT WEBSITE HW1 WAS DUE THIS MORNING 9AM LM00 & 01 WERE DUE THIS MORNING 9AM LM2, LM3, LM4, LM5 DUE THURSDAY MORNING 9AM CH302 Vanden Bout/LaBrake Spring 2012 Unit1Day2-Crawford Page 1
What are we going to learn today? Model Gas Concept – Gas Pressure Relationship Pressure and Volume CH302 Vanden Bout/LaBrake Spring 2012 CONCEPT PREASSESS INDEPENDENT WORK 1 MINUTE PER QUESTION DO YOUR BEST! CH302 Vanden Bout/LaBrake Spring 2012 QUIZ: CLICKER QUESTION 1 (NO TALKING points for CORRECT answer) In the small particle model of a gas - an atomic gas is treated the same as a molecular gas. a) TRUE Unit1Day2-Crawford Page 2 b) FALSE
In the small particle model of a gas - an atomic gas is treated the same as a molecular gas. a) TRUE b) FALSE CH302 Vanden Bout/LaBrake Spring 2012 Describe a Gas PHYSICAL DESCRIPTION: VOLUME PRESSURE TEMPERATURE AMOUNT CH302 Vanden Bout/LaBrake Spring 2012 Unit1Day2-Crawford Page 3
Describe a Gas PHYSICAL DESCRIPTION: VOLUME PRESSURE – most abstract property TEMPERATURE AMOUNT CH302 Vanden Bout/LaBrake Spring 2012 Consider Pressure Stand Flat Footed – trace your foot on graph paper Stand on Tippy Toe - trace your foot on graph paper CH302 Vanden Bout/LaBrake Spring 2012 POLLING: CLICKER QUESTION 2 (points for everyone) Consider the flat foot vs the tippy toed foot, which of the following answers is correct? a) The flat foot exerted more pressure. b) Both exerted the same pressure. c) The tippy toe exerted more pressure. Unit1Day2-Crawford Page 4
of the following answers is correct? a) The flat foot exerted more pressure. b) Both exerted the same pressure. c) The tippy toe exerted more pressure. d) Both exerted the same pressure, but the flat foot exerted more force. e) Both exerted the same pressure, but the tippy toed exerted more force. CH302 Vanden Bout/LaBrake Spring 2012 Could you do a calculation to verify your answer choice? EXPLAIN YOUR ANSWER CALCULATE AND REPORT ANSWER IN UNITS of psi and atm CH302 Vanden Bout/LaBrake Spring 2012 Unit1Day2-Crawford Page 5
CH302 Vanden Bout/LaBrake Spring 2012 Collapsing Can Demo CH302 Vanden Bout/LaBrake Spring 2012 POLLING: CLICKER QUESTION 3 The can collapsed because the pressure: a) inside the can was greater than outside the can b) outside the can was greater than inside the can c) inside the can was the same as the pressure outside the can but the metal contracted when chilled d) It was just a magic trick to impress us CH302 Vanden Bout/LaBrake Spring 2012 Unit1Day2-Crawford Page 6
Do the syringe activity CH302 Vanden Bout/LaBrake Spring 2012 CH302 Vanden Bout/LaBrake Spring 2012 Unit1Day2-Crawford Page 7
Balloon in Vacuum Demo Turn on vacuum pump CH302 Vanden Bout/LaBrake Spring 2012 What did we learn today? Concept of pressure and magnitude of pressure units – more quantitative information in LM Relationship between pressure and volume of a gas – Law of Nature Laws of Nature have predictive power. Start thinking in a microscopic view of what is occurring on a macroscopic scale – thinking like a chemist. Anything Else? Please Share…. CH302 Vanden Bout/LaBrake Spring 2012 Unit1Day2-Crawford Page 8
DAY 1 & DAY 2 LEARNING OUTCOMES Perform stoichiometric calculations using masses, moles, limiting reagents and percent yields Define the terms metacognition, flipped classroom, student centered learning, mindset and be able to relate them to nes learning in this course Explain and apply Boyles, Charles, and Avogadro ’ s Gas Laws to observations of gas behavior Describe the concept of pressure from a macroscopic and microscopic perspective. CH302 Vanden Bout/LaBrake Spring 2012 Unit1Day2-Crawford Page 9
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