P6 - Molecules and Matter

Question 1

Density

Answer 1

• Amount of particles squished into a given space

Question 2

Finding density of a Solid

Answer 2

1. Find mass using scales
2. Find measurements of the solid and calculate the volume
3. Work out the density

Question 3

Finding density of an irregular Solid

Answer 3

1. Find mass using scales
2. Fill up an eureka can with a measuring cylinder near it
3. Place solid into the can and record the volume of the water in the measuring cylinder
4. Work out the density

Question 4

Solids

Answer 4

• Particles are close together with strong forces, particles don’t have much energy

Question 5

Liquids

Answer 5

• Particles have weaker forces and can slide on top of each other, they have more energy than solids

Question 6

Gases

Answer 6

• Have close to no force and are free to move, the particles have lots of kinetic energy

Question 7

Changes of States

Answer 7

• [Solid > Liquid is Melting], [Liquid < Solid, Freezing]
• [Liquid > Gas is Evaporating], [Gas < Liquid is Condensing]
• [Solid > Gas is Sublimating]

Question 8

Internal Energy

Answer 8

• Energy stored by the particles that make up a System

Question 9

System

Answer 9

• An object made of particles, e.g. Solid, Liquid, Gas

Question 10

How to change states

Answer 10

• Requires energy by boiling/heating increasing the Internal Energy

Question 11

Changes of states on a graph

Answer 11

• While the line is ascending/descending its in a state

- While is stationary its Freezing, Condensing, Evaporating etc.

Question 12

Specific Latent Heat

Answer 12

• Amount of energy required to change the state of an object

Question 13

Specific Latent Heat Formula

Answer 13

• Energy = Mass x Specific Latent Heat

Question 14

How pressure increases

Answer 14

• Colliding gas particles

- Increasing temperature of gas particles