P1.2.4 - Specific Latent Heat

Question 1

What must you do to create a change of state?

Answer 1

Change the temperature

Question 2

When water evaporates, where is energy transferred from and to?

Answer 2

Energy is transferred from the thermal store of the surroundings to the water

Question 3

What is the temperature increase when water freezes?

Answer 3

0

Question 4

What is the specific latent heat of fusion?

Answer 4

The energy transferred from 1kg of a substance changes from the solid state to the liquid state (and vice versa)

Question 5

What is the specific latent heat of vaporisation?

Answer 5

The energy transferred from 1kg of a substance changes from the liquid state to the gas state (and vice versa)

Question 6

How do you calculate specific latent heat?

Answer 6

Thermal energy for a change in state(J) / mass(kg)

Question 7

What is the unit for specific latent heat?

Answer 7

(J/kg)

Question 8

What is different about specific latent heat and specific heat capacity?

Answer 8

Latent heat is about the change of state, while specific heat capacity is about the change of temperature