sp14 - specifc latent heat

Question 1

specific latent heat

Answer 1

the slh of a change of state of a substance is the amount of energy needed to change 1kg of it from one state to another without changing its temperature

Question 2

specific latent heat of fusion

Answer 2

SLH for changing between a solid and a liquid (melting or freezing)

Question 3

specific latent heat of vaporisation

Answer 3

The SLH for changing between a liquid and a gas

Question 4

why does the temperature go constant when increasing the temperature of a substance

Answer 4

the energy put in is weakening the forces of attraction between particles

Question 5

when a substance is condensing or freezing what happens to the bonds

Answer 5

bonds are forming between particles, which release energy. This means the temperature doesn’t go down until all the substance has turned into a liquid (condensing) or a solid (freezing)