Topic 3 Core questions - Particle model of matter

Question 1

How much mass a substance contains compared to it’s volume is…

Answer 1

density

Question 2

State the equation for density

Answer 2

Density(kg/m³) = Mass(kg)/Volume(m³)

p=m/v

Question 3

Name the change of state when a liquid becomes a solid

Answer 3

freezing

Question 4

Name the change of state when a solid becomes a liquid

Answer 4

melting

Question 5

Name the change of state when a liquid becomes a gas

Answer 5

evaporation

Question 6

Name the change of state when a gas becomes a liquid

Answer 6

condensation

Question 7

Name the change of state when a solid becomes a gas (without passing through liquid form)

Answer 7

sublimation

Question 8

Changes of state are caused by the amount of _________ a substance has

Answer 8

energy

Question 9

State changes are examples of ___________ change

Answer 9

physical

Question 10

Physical changes are ones which can be _____________

Answer 10

reversed

Question 11

A change which creates new products and cannot be reversed is _________ change

Answer 11

chemical

Question 12

The energy stored inside a system by the particles which make it up is known as ____________ energy

Answer 12

internal

Question 13

What is internal energy?

Answer 13

The total kinetic energy and potential energy of all the particles in a system

Question 14

Energy stored within moving objects is __________

Answer 14

kinetic

Question 15

Energy stored in particles because of their position is…?

Answer 15

potential energy

Question 16

Particles wich are further apart have _________ potential energy

Answer 16

more

Question 17

The energy needed to raise the temperature of 1 kg of a material by 1ᵒC is the __________

Answer 17

specific heat capacity

Question 18

The average kinetic energy of particles is known as the ___________

Answer 18

temperature

Question 19

The amount of energy required to change the state of one kilogram of a substance with no change in temperature is the …?

Answer 19

specific latent heat

Question 20

Latent heat of fusion is for changing…?

Answer 20

solid to liquid

Question 21

Latent heat of vaporisation is for changing….?

Answer 21

liquid to vapour (gas)

Question 22

Increasing temperature ______________ pressure in a gas if volume is constant

Answer 22

increases

Question 23

The force exerted by a gas on a surface as the particles collide with it is known as….?

Answer 23

gas pressure

Question 24

Why doesn’t temperature increase during melting?

Answer 24

Energy is being used to weaken forces between particles

Question 25

Why doesn’t temperature increase during evaporation

Answer 25

Energy is being used to weaken forces between particles

Question 26

Why does the temperature of a substance increase as it is heated?

Answer 26

Particles gain more kinetic energy and temperature is a measure of kinetic energy

Question 27

Particles are arranged regularly in a ….?

Answer 27

solid

Question 28

Particles are arranged randomly, but touching in a …?

Answer 28

liquid

Question 29

Particles move around randomly in a ….?

Answer 29

gas