specific latent heat energy

Question 1

Why does temperature not increase while melting or boiling?

Answer 1

•when melting or boiling you’re still putting in energy so increasing the internal energy but the energy is used for breaking bonds between particles rather than changing temperature

Question 2

why are there flat spots on a heating graph?

Answer 2

to show when energy is being transferred by heating or energy is being released when bonds are forming but not being used to change temperature e.g when melting or boiling

Question 3

why does temperature not change while condensing or freezing?

Answer 3

•because bonds are forming between particles which releases energy. This means the internal energy decreases but the the temperature doesn’t go down untill all the substance has turned to a liquid or solid.

Question 4

what is specific latent heat?

Answer 4

the amount of energy needed to change 1kg of a substance from one state to another without changing it’s temperature

Question 5

what is specific latent heat of fusion?

Answer 5

the amount of energy needed to melt 1kg of substance with no change in temperature

Question 6

what is specific latent heat of vaporisation?

Answer 6

the amount of energy needed to boil away 1kg of a substance with no change of temperature

Question 7

what is the equation for specific latent heat?

Answer 7