Chapter 15 Kinetic Molecular Theory. Some Amazing Things

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”