C3.1 States of matter

Question 1

What are the properties of solids?

Answer 1

➢ Fixed shape and volume

➢ Cannot be compressed

Question 2

What are the properties of liquids?

Answer 2

➢ Have a fixed volume but they can flow and change their shape

Question 3

What are the properties of gases?

Answer 3

➢ Have no fixed shape or volume

➢ Can be compressed easily

Question 4

What does the particle theory descibe?

Answer 4

➢ The movement of particles

➢ The average distances between particles

Question 5

How are the particles arranged in a solid?

Answer 5

➢ Each particle is arranged in fixed rows and they remain in this fixed arrangement
➢ They cannot move - but can vibrate

Question 6

How are the particles arranged in a liquid?

Answer 6

➢ Very close together but they can move past each other

Question 7

How are the particles arranged in a gas?

Answer 7

➢ They move around at high speeds

➢ Random arrangement

Question 8

When does the solid turn into a liquid?

Answer 8

➢ When it melts

Question 9

How does a solid turn into a liquid?

Answer 9

➢ The vibrations of the particles will be so strong that the particles begin to break free from their neighbors

Question 10

When does a liquid turn into a gas?

Answer 10

➢ At its boiling point

Question 11

What is sublimation?

Answer 11

➢ When a solid is heated and changes directly into a gas

Question 12

What are some limitations of the particle model?

Answer 12

➢ Assumes all particles are made up solid spheres with no forces between them
➢ Does not show the actual size of the particles
➢ Atoms are mostly empty space