1. Drill: Using Boyle’s Law solve the following problem.
If L of gas exerts a pressure of 94.6 kPa, what would the volume be at standard pressure ( kPa)?

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

3. SAT Enrichment:
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.

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).

5. SAT Enrichment:
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.

6. SAT Enrichment: This article implies….
a. Boyle’s law is what allows people to dive.
b. Divers do not need to understand gas laws to dive safely.
c. By understanding the gas laws, divers can be better prepared for conditions while diving.
d. Divers should take a chemistry course before diving.
e. Boyle’s law is the only law divers need to understand.

7. Relationship b/w Temperature & Pressure @ constant volume
Gay-Lussac’s Law
Relationship b/w Temperature & constant volume

8. Pre-Lab
Students will complete the pre-lab to Gay-Lussac’s Law Lab

9. Exploration:
Students will investigate Gay-Lussac’s Law Pressure-Temperature Relationship in Gases Lab. (30 min)
Demo

10. Explanation:
Students will complete analysis questions 1-6 to the lab. (25 min)

11. Summary Questions Define Gay-Lussac’s Law?
What is the equation used to represent Gay-Lussac’s Law?
What does k stand for?
Describe the relationship b/w pressure and temperature?
If pressure is increased by a third what happens to temperature?
What was the most crucial part in the lab? Explain

12. Extension: Final Exam Review Packet Homework: Questions 5-7
Gay-Lussac’s Law worksheet