1. Who is Robert Boyle?
What is the Boyles’s Law?
Drill:

2. Objective: The student will be able to:
Complete Charles’s Law Stimulation in order to determine the relationship between temperature and volume at constant pressure.
Objective:

3. To dive safely, it is important to be familiar with the physical laws that govern the sport. One of the most elementary is Boyle’s Law. In 1660 Robert Boyle conducted experiments with pressure and volume relationships. He determined that doubling the pressure on a gas decreased volume of gas by one-half. Thus was born Boyle’s Law:
At constant temperature, the volume of a gas varies inversely with absolute pressure, while density varies directly with absolute pressure.
SAT Enrichment:

4. SAT Enrichment: Divers And Boyle's Law
This law has particular relevance to divers, as it has bearing on both mechanical effects and physiological effects of pressure.
Mechanical effects of pressure and volume include variations in buoyancy (e.g. a diver’s use of a buoyancy compensator to descend or ascend).
SAT Enrichment:

5. Physiological effects of volume and pressure include potential impact on air- filled spaces in the human body (e.g. areas of potential baratrauma injuries).
In addition, Boyle’s Law interplays with other gas laws such as Dalton's Law— which, though not covered here—combine to dictate additional stresses on the a diver’s respiratory, circulatory, and nervous system.
SAT Enrichment:

6. In the first paragraph of this article, the author describes Boyle’s Law. What is the formula for Boyle’s Law?
PV = nRT
P1V2=P2V1
P1/V1 = P2/V2
P1V1 = P2V2
PT = P1 + P2 + P3 …..
SAT/HSA Enrichment:

7. Relationship b/w Temperature & Volume @ constant pressure
Charles’s Law
Relationship b/w Temperature & constant pressure

8. Demonstration: 1. Set out a round bottom flask and an unused balloon.
2. Solicit a volunteer to try to blow up the balloon inside the flask.
Class make a prediction as to whether this can be done.
3. Student make sure you keep the balloon in the flask as you try to blow up the balloon.
Demonstration:

9. 4. Place a small amount of water in the flask and heat until it boils and steam is coming out of the flask.
5. CAREFULLY put the balloon around the edge of the hot flask.
6. Students- predict what will happen if the flask is placed into an ice water bath.
7. After a minute or two, carefully place the flask with the balloon into an ice water bath.
Demonstration:

10. Students will complete a Charles’s law computer stimulation.

11. Explanation: Students will complete Charles’s Law problems.
Charles Law worksheet. (Turn in)
Explanation:

12. Summary Questions Define Charles’s Law?
What is the equation used to represent Charles’s Law?
What does k stand for?
Describe the relationship b/w volume and temperature?
If volume is increased by a third what happens to temperature?
Summary Questions

13. Final Exam
Questions 8-11
Homework:
Charles Law Problems
Extension