CP12b Energy And Changes Of State

Question 1

What happens when a solid stores more thermal energy?

Answer 1

The vibrations of its particles increase

Question 2

What happens to liquids and gases store more thermal energy?

Answer 2

The speed of the particles increase

Question 3

Temperature

Answer 3

Is the measure of the movement of particles

Question 4

How can a store thermal energy be maintained?

Answer 4

By surrounding the warm object in insulating materials like wool, foam or bubble wrap

Question 5

The amount of energy of thermal energy stored in something depends on:

Answer 5

Its temperature
Its mass
The material its made from

Question 6

Specific heat capacity

Answer 6

The amount of energy it takes to increase the temperature of 1 kilogram of the substance by 1°C

Question 7

Temperature is measured in:

Answer 7

degrees celcius (°C)

Question 8

Explain why a saucepan of soup stores more energy than a spoonful of soup at the same temperature

Answer 8

There is more thermal energy in the saucepan because more energy is needed to increase the movement (temperature) of the particles to match the temperature of the soup in the spoonful

Question 9

The higher the specific heat capacity…

Answer 9

the more energy it takes to increase the temperature of 1 kilogram of the substance by 1°C

Question 10

Specific latent heat

Answer 10

The amount of energy it takes to make 1kg of a substance change state

Question 11

Which change of state requires the most energy to occur?

Answer 11

Evapouration