Behavior of Gases

Chapter 2 Section 2

Gases depend on:

•Temperature•Volume•Pressure

Temperature

• Measure of how fast the particles in an object are moving

• The faster they are moving the more energy they have

Volume

• Measure of the size of a body or region in three-dimensional space

• Depends on container

Pressure• Amount of force exerted per unit area of

a surface• Number of times the particles hit the

inside of their container• Higher pressure = more particles = closer

together• Lower pressure = less particles = farther

apart

Boyles Law: • States that for a fixed amount of gas at a

constant temperature, the volume of a gas increases as its pressure decreases.

• VOLUME PRESSURE

• VOLUME PRESSURE

• http://www.grc.nasa.gov/WWW/K-12/airplane/aboyle.html

Charles Law: • States that for a fixed amount of gas at a

constant pressure, the volume of the gas increases as its temperature increases.

• Temperature Volume

• Temperature Volume

• http://www.grc.nasa.gov/WWW/K-12/airplane/aglussac.html

Demonstrations

• Marshmallow Syringe

• Temperature Balloon

• PTV