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.
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
Absolute Zero
K = °C + 273
How do we lower temperature?
• We slow down the particles.
Kinetic Energy
KE = ½ mv2
When considering kinetic energy we must consider two factors.
1. Mass
2. Velocity
You’ve been bad and you were caught!
New Discipline System
Wow! Mr. Taylor-Lehman isn’t here
Do Not Touch
HCNH2S
Or DieStink
Homework
• Worksheet #34 “Temperature and Particle Motion”