c3

Question 1

what are three states of matter

Answer 1

solid, liquid and gas

Question 2

a pure substance will melt or boil at

Answer 2

fixed temperature
-mixture will melt or boil over a range of temps

Question 3

what does the amount of energy needed to change state from a solid to liquid or liquid to gas depend on

Answer 3

the strength of forces between the particles of the substance.
nature of particles depends on structure and bonding
the stronger the forces between the particle the higher the melting and boiling point