P3 : Specific Latent Heat

Question 1

Specific Latent Heat

Answer 1

Specific Latent Heat of a substance is the amount of energy required to change the state of one kilogram of the substance with no change in temperature

Question 2

Specific Latent Heat of fusion

Answer 2

The energy required to change 1kg of a substance from a solid to a liquid with no change in temperature

Question 3

Specific Latent Heat of vaporisation

Answer 3

The energy needed to change 1 kg of a substance from a liquid to a vapor with no change in temperature

Question 4

What equation links energy needed for change of state, mass and specific latent heat

Answer 4

E = m x l
E = energy needed for change of state (J)
m = mass (kg)
L = specific latent heat (J/kg)