1. Kinetic Molecular Theory of Gases Gases consist of molecules that are constantly moving through space in strait lines, randomly, and with various speeds

2. Kinetic Molecular Theory of Gases The average kinetic energy of the gas molecule is proportional to the absolute (K) temperature Meaning: the higher the temperature, the faster the gas particles move

3. Kinetic Molecular Theory of Gases The gas molecules collide with each other without loosing any kinetic energy – like billiard balls

4. Kinetic Molecular Theory of Gases The molecules volume is tiny compared to that of the container – the assumption that in comparison the gas molecules take up not volume is used

5. Kinetic Molecular Theory of Gases Gas molecules have no attraction between themselves

6. Kinetic Molecular Theory of Gases The collisions against the sides of the container constitute the pressure of the gas

7. Pressure Pressure = force / area SI unit = pascal (Pa) = 1 newton / m2 Atmospheric pressure – column of air pressing down on a given point

8. BarometerManometer

9. STP = Standard Temperature and Pressure STP 1atm = 760 mm Hg = 760 torr = 101,325 Pa