P1-Melting and Boiling

Question 1

when a substance in being melted or boiled what has to happen to do so?

Answer 1

the inter molecular bond has to break

Question 2

what has to happen when a substance is condensing or freezing?

Answer 2

bonds have to form which releases energy.

Question 3

what is specific latent heat tell us?

Answer 3

it’s the energy needed to change state

Question 4

what is the definition of specific latent heat of melting?

Answer 4

is the amount of energy needed to melt 1 kg of material without changing it’s temperature (the material has to be at its melting temperature already)

Question 5

what is the definition of specific latent heat (slh) of boiling?

Answer 5

is the energy needed to boil 1 kg of material without changing it’s temperature (the material has to be at it’s boiling temperature already)

Question 6

what is the formula for slh?

Answer 6

Energy= Mass x specific latent heat

Question 7

what is the slh of water?

Answer 7

334 000 j/kg