2A Specific Latent Heat

Question 1

specific latent heat

Answer 1

the amount of heat energy required to change the state of 1kg of a substance without changing its temperature

Question 2

when does a substance absorb energy

Answer 2

when it melts, boils, or sublimates

Question 3

when does a substance release energy

Answer 3

when it condenses, freezes, or deposits

Question 4

latent heat

Answer 4

the energy that is absorbed or released when a substance undergoes a change in state

Question 5

explain changes of state

Answer 5

when a substance undergoes a change of state its temperature remains the same due to the potential energy of the particles changing rather than the kinetic energy

Question 6

what happens when a substance melts, boils, sublimates

Answer 6

heat energy is required to break the bonds, increasing the potential energy

Question 7

what happens when a substance condenses, freezes, or deposits

Answer 7

particles release energy to form stronger bonds. this released energy manifests as a decrease in energy, which helps stabilise the structure without changing the kinetic energy

Question 8

Latent Heat of Fusion

Answer 8

the amount of energy required for a substance to change from a solid to a liquid

Question 9

Latent Heat of Vaporisation

Answer 9

the amount of energy required for a substance to change from a liquid to a gas

Question 10

specific latent heat formula

Answer 10

Q=mL