_____ is needed to melt a solid or boil a liquid.
For any pure substance undergoing a change of state, its temperature:
What changes of state happen at a substance's:
a) melting point
b) boiling point
What affects the melting and boiling point of a liquid?
Give an example of the previous statement
What happens during the horizontal lines (whilst the temperature stays the same)?
What is latent heat?
Explain what fusion is.
Compare evaporation and boiling