Chapter 7: Kinetic Model Of Matter Flashcards
Properties of solid
Fixed shape and volume
High density
Incompressible
Why solids have high density?
Particles are closely packed together
Why solids have fixed shapes and volumes?
Particles are held in place by very strong attractive forces
Properties of liquid
Fixed volume but no fixed shape
High density
Incompressible
Why liquids have high density?
Particles are slightly farther apart as compared to solids, and randomly arranged
Why liquids have fixed volumes but no fixed shapes?
There are attractive forces between the particles
Properties of gas
No fixed shape and volume
Low density
Compressible
Why gases have low density?
Particles are very far apart, and randomly arranged
Why gases have no fixed shapes and volumes?
The attractive forces between the particles is very weak
What is kinetic model of matter?
The kinetic model of matter states that the tiny particles that make up matter are always in continuous random motion
What is brownian motion?
The observed random movement of particles in a fluid
What is the effect of temperature on molecular motion?
- Temperature of air particles increase / decreases
- Average kinetic energy of air particles increases / decreases
- Average speed of air particles increase / decreases
- Air molecules hit _ particles more / less vigorously and frequently
- _ particles move more faster / slower and change direction more / less frequently
