CHEMISTRY CONTENT UNIT –
SCH3U GASES
Daniel Hickie, Efi Palvanov, Jason Fischer, David
Sheps
Minds-On
Kinetic Molecular Theory FUN!!!!
(f3.3 use the kinetic molecular theory to explain the properties
and behaviour of gases in terms of types and degrees of molecular
motion )
Overall Expectations
F1. analyse the cumulative effects of human
activities and technologies on air quality, and
describe some Canadian initiatives to reduce air
pollution, including ways to reduce their own
carbon footprint
F2. investigate gas laws that explain the behaviour
of gases, and solve related problems
F3. demonstrate an understanding of the laws that
explain the behaviour of gases.
Gases: Location in the course and Prior Knowledge
Location in the course:
After Unit D (Quantities in chemical reactions)
Should come after Unit E (solutions) but doesn’t absolutely
have to.
Prior knowledge:
Changes of state (Previous years)
Mole/Stoichiometry (Unit D)
Temperature scales (Previous years)
Sig Figs (Grade 10)
Gases: Guiding Questions
Overarching Question:
How can we use our understanding of the physical and
chemical properties of gases to explain natural phenomena
in, and assess human impact on, the atmosphere, in both local
and global contexts?
Gases: Guiding Questions
1. How can we use models such as kinetic molecular theory
to distinguish the physical properties of molecules in gaseous
state from those in solids and liquids?
2. What are the qualitative and quantitative relationships
between pressure, volume, temperature, and mass of a
gas?
3. How can we use stoichiometry and the variable physical
properties of gases to quantitatively predict the outcome of
chemical reactions involving gases?
4. What are some of the social, technological, and
environmental considerations related to gas and atmospheric
chemistry?
Student Misconceptions About Gases
• Gases have no mass, change of state to gas involves loss
of mass, air (the atmosphere) exerts no pressure
• KMT, e.g., heating a gas causes molecules to expand, or
relocate to top of vessel
• Misunderstanding concept of temperature; unable to
distinguish molecular velocity and average kinetic energy
of a gas
• Students apply molar volume at STP (22.4 L/mol) to
problems where conditions are not at STP
Monday
Tuesday
Wednesday
Thursday
Friday
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Introduction
Minds-on
demo/videos
What is a gas?
Kinetic Molecular
Theory
How do we measure
and describe gasses?
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Pressure
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Volume
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Temperature
KWL Charts
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LAB 1 – Testing the Ideal
Gas Law
Gas constant R
Ideal Gas Law
Practice Problems
Address
misconceptions
Problem solving in groups
Homework: Gas Law
Worksheet
Gas Relationships
Boyle’s Law
Charles’ Law
Related Problems
Address
misconceptions
DEMO
Ticket out of class – 1Q
VIDEO
Research period for STSE
blog project
Revisit KWL charts
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DISCUSSION
Gasses in the
atmosphere
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Real-world
applications
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Hand in Lab 1
Homework: complete
mindmap on gases & real
world
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Avogadro’s number
Molar volume and
molar mass
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Gas density
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Practice problems
Homework: worksheet
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Stoichiometry
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Practice problems
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Take up prelab
Group problems
Homework: Worksheet ctd.
Project presentations
Teacher evaluates.
Project presentations
Teacher evaluates.
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Test Review period
Questions and
answers
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Hand in Lab 2
Revisit KWL charts, and
complete them
Temperature scales
(Kelvin, Celsius…)
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Absolute Zero
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Gay-Lussac’s Law
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Combined Gas Law
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Address
misconceptions
Homework: Worksheet
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QUIZ
Vapour pressure
Activity 2 – Oxygen
composition in the air
LAB 2 – Production of
Hydrogen Gas
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REVIEW GAME
Jeopardy-style review
game
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Avogadro’s
Hypothesis
Assign STSE Blog
Project
Activity 1 – Coke Can
investigation
Address
misconceptions
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Partial pressures
Dalton’s Law
Practice problems
Address
misconceptions
Homework: Prepare/reflect
on gases in our everyday
lives
QUIZ
Work period to finish STSE
blog projects
Self- and peer-assessment
of projects
Checklist
UNIT TEST
STSE Blog
http://feelinggassy.wordpress.com
Activity