6.3.2.3 Changes of State and Specific Latent Heat Flashcards
1
Q
What is latent heat?
A
- the energy needed for a substance to change state
2
Q
What happens when a change of state occurs?
A
- energy supplied changes the internal energy but not the temperature
3
Q
What is the specific latent heat of a substance?
A
- amount of energy required to change the state of one kilogram of the substance with no change in temperature
4
Q
What is the equation for energy for a change of state?
A
- energy for a change of state = mass x specific latent heat
5
Q
What is energy measured in?
A
- joules
- J
6
Q
What is mass measured in?
A
- kilograms
- kg
7
Q
What is specific latent heat measured in?
A
- joules per kilogram
- J/kg
8
Q
What is specific latent heat of fusion?
A
- change of state from solid to liquid
9
Q
What is specific latent heat of vaporisation?
A
- change of state from liquid to vapour
