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Chapter 15 Kinetic Molecular Theory
Chapter 15
Kinetic Molecular Theory
Some Amazing Things
Kinetic Theory
Kinetic Theory• All matter is composed of tiny particles.
Kinetic Theory• All matter is composed of tiny particles
– Atoms
Kinetic Theory• All matter is composed of tiny particles
– Atoms– Molecules
Kinetic Theory• All matter is composed of tiny particles
– Atoms– Molecules– Ions
Kinetic Theory
• These tiny particles are in constant motion.
LiquidSolid Gas
Kinetic Theory• Collisions between moving particles are
perfectly elastic.– In an elastic collision there is no net change in
kinetic energy.
Pressure
• Pressure depends on two factors
1. Force
2. Area
Pressure =Force
Area
Examples of Pressure
Gas Pressure
Temperature• How hot or cold
• Average kinetic energy
How do we lower temperature?
• We slow down the particles.
Absolute Zero
K = °C + 273
°C = K - 273
Kinetic Energy
KE = ½ mv2
When considering kinetic energy we must consider two factors.
1. Mass
2. Velocity
New Discipline System
“Old Fashioned Discipline”
New Discipline System “Old Fashioned Discipline”
I’m Here for Class Mr. Stillwell.
Where’s Mr. Stillwell?
Do Not Touch
HCNH2S
DieStink
Or
And DieStink
Do Not Touch
HCNH2S
Do Not Touch
HCN
27 amu
H2S
34 amu
Homework
• Worksheet #34 “Temperature and Particle Motion”
