Chemistry Week 1-2

Question 1

What is diffusion?

Answer 1

The movement of particles from an area of high concentration to a lower concentration.

Question 2

How can you tell when diffusion is complete?

Answer 2

When all particles are evenly mixed.

Question 3

What are the smallest possible particles that can be produced my chemical reactions?

Answer 3

Atoms (Cannot be broken down further into smaller particles)

Question 4

Particle Arrangement in Solids, Liquids and gases.

Answer 4

Solids: Particles Touching and regularly arranged.
Liquids: Close together irregularly arranged.
Gases: Far apart, randomly arranged.

Question 5

Shape In all states?

Answer 5

Solids: Fixed
Liquids: Takes shape of container
Gases: Takes shape of container

Question 6

Volume in all states?

Answer 6

solids: Fixed
Liquids: Fixed
Gases: Not fixed (Dependent on container)

Question 7

Solid to Gas?

Answer 7

Sublimation

Question 8

Gas to Solid?

Answer 8

Deposition

Question 9

Solid to Liquid?

Answer 9

Melting

Question 10

Liquid to Solid?

Answer 10

Solidification or Freezing

Question 11

Liquid to Gas?

Answer 11

Evaporation

Question 12

Gas to Liquid?

Answer 12

Condensation

Question 13

Evaporation?

Answer 13

• Happens on surface
• Happens in a range of temperatures
• NO bubbles
• Energy from surroundings
• Slow

Question 14

Boiling?

Answer 14

• Happens throughout the liquid
• Happens at a definite temp.
• Bubbles
• Faster
• Source of energy needed