1. Gas Simulation Directions:
Write down at least four features of the gas model you see. 1. 2. 3. 4.
Answer the following questions afterward:
1. What causes the gas particles to change direction in the model?
2. What do you notice about the speeds of the particles in the model?
3. What do you observe when the temperature changes in the model?

2. Kinetic Molecular Theory of Gases
1. gases are made up of tiny particles (atoms/molecules)
2. each particle is so small that their volume is considered to be 0
3. each particle has a constant random motion colliding with walls  this creates pressure exerted by the gas
4. the particles do not attract or repel each other
5. the kinetic energy of particles is proportional to the Kelvin temperature of the gas (ie. more heat = more energy = higher temperature)

3. Kelvin (K) = Celsius (ºC) + 273 Celsius (ºC) = Kelvin (K) - 273
Temperature and Gases
-When dealing with gases, the temperature used is always in Kelvin (K)
-To switch between Celsius (ºC) and Kelvin (K), use the following equation(s):
Kelvin (K) = Celsius (ºC) + 273
Celsius (ºC) = Kelvin (K) - 273
***Standard temperature is 0°C, and standard pressure (STP) is 1 atmosphere (760 mm Hg)***

4. Volume -Volume is the amount of space that something takes up
-All matter takes up at least some
space
-a measuring cup, graduated
cylinder, or beaker can all be used to
measure volume
-units of scientific volume include:
milliliters (mL)
liters (L); 1000 mL
cubic centimeters (cm3); same as mL
cubic millimeters (mm3)