Latent heat and changes of state

Cards (14)

Boiling point= ......?
condensing point
Melting point=.....?
Freezing point
Pure elements and pure compounds will always have fixed melting and boiling points.
What is a boiling point? 
The temperature at which a substance changes from a liquid to a gas as quickly as it can
What is latent heat? 
Heat absorbed or released during a state change without a change in temperature.
What is latent heat used for? 
It gives the particles energy to break bonds or create stronger bonds.
What is the latent heat of fusion? 
The amount of energy required to melt/freeze a substance
What is the latent heat of evaporation? 
the amount of energy required to boil/condense a substance
when a solid melts, energy is used to break the bonds between particles
when a liquid freeze, energy is used to form stronger bonds between particles and the latent heat of fusion is given out to the environment
What is the specific latent heat of fusion? 
the amount of energy required to melt/freeze 1kg of the substance
What is the specific latent heat of vaporisation? 
the amount of energy required to boil/condense 1kg of a substance
What is the equation for specific latent heat?
Energy = mass x SLH
What is the difference between SLH and SCH? 
SCH = change in temperature
SLH = change in state