Gas -Conforms to shape of container -Fills the container’s entire volume -Easily compressed

Kinetic -Greek word -“to move” -Objects in motion have kinetic energy

Kinetic Molecular Theory -Describes behavior of gases in terms of particles in motion

Kinetic Molecular Theory Particle size- small Particle motion- constant, random motion Particle energy- mass and velocity KE=1/2mv 2

Behavior of Gases 1. Low density- particles are far apart (fewer gas molecules) D=m/v

Behavior of Gases 2. Compressibility - Volume of a gas can be reduced

Behavior of Gases 3. Diffusion and Effusion effusion- random motion of gases diffusion- slow steady movement of gases from one region to another

Gas Pressure -Force per unit area -Gas particles exert pressure when they collide with the walls of their container

Barometer -Instrument used to measure atmospheric pressure