The document discusses Charles's Law and Boyle's Law. Charles's Law states that for an ideal gas at constant pressure, the volume is directly proportional to the temperature. Boyle's Law states that for a fixed amount of an ideal gas kept at a fixed temperature, volume and pressure are inversely proportional. The document then provides examples and demonstrations of these gas laws, followed by a scenario asking why a bicycle tire went flat again soon after being changed, likely related to the temperature changes described in Charles's Law.

1. Today’s Lesson:
Charles’s Law & Boyle’s Law

2. Lesson Objective
Students will be able to describe Charles’s Gas Law and
Boyle’s Gas Law and use these laws to solve a real-life
problem relating to these concepts.

3. Charles’s Law
Definition
For an ideal gas at constant pressure, it’s volume is directly
proportional to its temperature.
(An ideal gas refers to a hypothetical gas whose molecules
occupy negligible space and have no interactions, and that
consequently obey the gas laws exactly.)

4. Charles’s Law
Illustration

5. Charles’s Law
Math & Graph
V α T

6. Charles’s Law
Demonstration
The “Self-Inflating” Balloon

7. Boyle’s Law
Definition
For a fixed amount of an ideal gas kept at a fixed
temperature, volume and pressure are inversely
proportional.

8. Boyle’s Law
Illustration

9. Boyle’s Law
Math & Graph

10. Boyle’s Law
Demonstrations
The Depressed Bubble
The Cartesian Diver
Boyle’s Balloon
Boyle’s “Cool” Boil

11. Summary / Mnemonics
Law shows a
proportional relationship between
the volume and temperature of an
ideal gas at constant pressure.
For volume and pressure,
Law with letters of six shows us
some inversely proportional tricks!

12. Application of Concepts
Read the “Double Flat” scenario and answer the open-
ended question that follows being sure to identify and
discuss the appropriate gas law(s) that help support
your answer.
If you do not have time to give me an answer during
this demo lesson, feel free to email me your answer
and/or comments about this lesson.
My E-mail: snobbigdet@gmail.com

13. Double Flat
I recently took a very long and hot bicycle trip from
Camp Hill, PA to Charlestown, SC. During my trip I
had a flat tire on my back wheel. When I changed the
flat I replaced the tube with a relatively cool (“cool” in
terms of temperature) tube from one of my bike bags
and inflated it to its maximum pressure with relatively
cool air from my bike pump. After putting the wheel
back onto my heavily loaded bike, I took-off again
immediately turning onto a dark-black, freshly-paved
road. Then, within 5 minutes, a surprising and
disappointing thing happened: THE SAME TIRE
WENT FLAT!

14. Open-Ended Question
Based on your understanding of Charles’s and Boyle’s
Gas Laws, why did my bicycle tire go flat a second time
so soon after it was changed?
Note: Look for clues in the scenario that connect to
one or more of the gas laws in order to identify and
discuss the appropriate gas law(s) to support your
answer.