1. Ch Gases
II. The Gas Laws P V T

2. Robert Boyle ( )
Boyle was born into an aristocratic Irish family
Became interested in medicine and the new science of Galileo and studied chemistry. 
A founder and an influential fellow of the Royal Society of London
Wrote extensively on science, philosophy, and theology.

3. A. Boyle’s Law P V
PV = k

4. A. Boyle’s Law
The pressure and volume of a gas are inversely related
at constant mass & temp P V
PV = k

5. A. Boyle’s Law

6. Jacques Charles (1746-1823) This is how his interest in gases started
Part of a scientific balloon flight in 1783 –one of three passengers in the second balloon ascension that carried humans
This is how his interest in gases started
It was a hydrogen filled balloon!

7. B. Charles’ Law V T

8. B. Charles’ Law
The volume and absolute temperature (K) of a gas are directly related
at constant mass & pressure V T

9. B. Charles’ Law

10. Joseph Louis Gay-Lussac (1778 – 1850)
French chemist and physicist
Known for his studies on the physical properties of gases.
In 1804 he made balloon ascensions to study magnetic forces and to observe the composition and temperature of the air at different altitudes.

11. C. Gay-Lussac’s Law P T

12. C. Gay-Lussac’s Law
The pressure and absolute temperature (K) of a gas are directly related
at constant mass & volume P T

13. PV T V T P T PV = k P1V1 T1 = P2V2 T2 P1V1T2 = P2V2T1
D. Combined Gas Law PV T V T P T PV
= k
P1V1 T1 =
P2V2 T2
P1V1T2 = P2V2T1