1. Intro to Gases

2. Kinetic Molecular Theory
Gas particles are in continuous, random motion.
Collisions between gas particles are completely elastic. In other words, there is no net loss or gain of kinetic energy when particles collide.
The average kinetic energy is the same for all gases at a given temperature, regardless of the identity of the gas.

3. Gas PRESSURE is the result of simultaneous COLLISIONS of billions of CONTINUOUS moving particles

4. PRESSURE
Gas Pressure: the pressure exerted by a gas A force exerted per unit area
Vacuum: an empty space in which there is no air or other gas : a space from which all or most of the air has been removed

5. Units of Pressure
1 atm
760 mmHg
760 torr
kPa
These units are all equivalent to each other

6. Convert 3.0 atm to mmHg

7. Convert 1520 torr to kPa

8. Pressure and Temperature
From the given graph, what is the relationship between Pressure and Temperature?

9. PV = constantT
Because as volume INCREASES temperature INCREASES

10. The AVERAGE temperature of a substance is DIRECTLY proportional to the KINETIC MOLECULAR THEORY of gas particle.
To convert between Levin and Celcius: ____deg C = _______ K