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CH302 Vanden Bout/LaBrake Spring 2012
Vanden Bout/LaBrake
CH301
GAS PRESSURE
Day 2
CH302 Vanden Bout/LaBrake Spring 2012
Important Information
USE PIAZZA FOR QUESTIONS……..LEARN ABOUT WEBSITE
COMPLETE ONLINE SURVEYS RECEIVED IN THE EMAIL
HW1 WAS DUE THIS MORNING 9AMLM1 WAS DUE THIS MORNING 9AMREADINESS ASSESSMENT CLOSES 5 PM TODAY
LM2, LM3, LM4, LM5 DUE THURSDAY MORNING 9AM
UNIT2 DAY2 VDBMonday, September 03, 20129:34 PM
UNIT2DAY2-VDB Page 1
CH302 Vanden Bout/LaBrake Spring 2012
What are we going to learn today?
Model GasConcept – Gas Pressure
Relationship Pressure and Volume
CH302 Vanden Bout/LaBrake Spring 2012
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.
UNIT2DAY2-VDB Page 2
CH302 Vanden Bout/LaBrake Spring 2012
CONCEPT PREASSESS
INDEPENDENT WORK
1 MINUTE PER QUESTIONDO YOUR BEST!
CH302 Vanden Bout/LaBrake Spring 2012
In the small particle model of a gas -an atom is treated the same as a
molecule.
a) TRUE
b) FALSE
QUIZ: CLICKER QUESTION 1 (NO TALKING points for CORRECT answer)
UNIT2DAY2-VDB Page 3
CH302 Vanden Bout/LaBrake Spring 2012
Describe a Gas
PHYSICAL DESCRIPTION:
VOLUMEPRESSURE
TEMPERATUREAMOUNT
CH302 Vanden Bout/LaBrake Spring 2012
Describe a Gas
PHYSICAL DESCRIPTION:
VOLUMEPRESSURE – most abstract property
TEMPERATUREAMOUNT
UNIT2DAY2-VDB Page 4
CH302 Vanden Bout/LaBrake Spring 2012
Consider Pressure
HEAVY PERSON LIGHT PERSON
Stand Flat Footed
Stand on Tippy Toe
CH302 Vanden Bout/LaBrake Spring 2012
Concerning the heavier vs the lighter student, which of the following answers is correct?
a) Both exerted the same pressure when flat footed.b) Both exerted the same pressure when on tippy toes.c) The students did not exert a pressure on the ground – only a force.d)The heavier person exerted more pressure on the ground in both cases.e)The heavier person exerted more pressure on the ground when flat footed, but the two individuals exerted the same pressure when on tippy toes.
POLLING: CLICKER QUESTION 2 (points for everyone)
UNIT2DAY2-VDB Page 5
CH302 Vanden Bout/LaBrake Spring 2012
Could you do a calculation to verify your answer choice?
CH302 Vanden Bout/LaBrake Spring 2012
CH302 Vanden Bout/LaBrake Spring 2012
Collapsing Can Demo
UNIT2DAY2-VDB Page 6
CH302 Vanden Bout/LaBrake Spring 2012
Collapsing Can Demo
CH302 Vanden Bout/LaBrake Spring 2012
The can collapsed because the pressure:
POLLING: CLICKER QUESTION 3
a) inside the can was greater than outside the canb) outside the can was greater than inside the canc) inside the can was the same as the pressure outside the
can but the metal contracted when chilledd) It was just a magic trick to impress us
CH302 Vanden Bout/LaBrake Spring 2012
Do the syringe activity
UNIT2DAY2-VDB Page 7
CH302 Vanden Bout/LaBrake Spring 2012
CH302 Vanden Bout/LaBrake Spring 2012
Balloon in Vacuum Demo
Turn on vacuum pump
UNIT2DAY2-VDB Page 8
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 NatureLaws 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
Explanation Space
UNIT2DAY2-VDB Page 9