Terms in this set (20)

  • What are some defining properties of gases?
    - Expand to fill their container - Indefinite shape and indefinite volume - Kinetic energy of particles is stronger than the forces of attractions - Particles move quickly - Boiling results in this state of matter
  • What are some defining properties of liquids?
    - Indefinite shape and definite volume - Kinetic energy and forces of attractions between particles is about even - Particles can flow - Melting or condensing results in this state of matter
  • What are some defining properties of solids?
    - Definite shape and volume - Kinetic energy is less than the forces of attractions between particles - Particles can only vibrate - Freezing results in this state of matter
  • Which state(s) of matter are present when boiling?
    Liquid and gas
  • Which state(s) of matter are present when freezing?
    Solid and liquid
  • What state(s) of matter are present at A?
    Solid only
  • What is the boiling point of this substance?
    100 degrees C
  • At 60 degrees C, what is the physical state of this substance?
    Liquid
  • At melting and boiling, temperatures stay the same (flat line on the graph). Why?
    Energy is being used to break apart the forces of attractions.
  • What phase change is happening from E to D?
    Condensing
  • What are the 2 endothermic phase changes?
    melting & boiling
  • Why did it take a few minutes for everyone to smell the vanilla during the vanilla lab?
    Vanilla particles are changing directions as they collide with the air particles
  • What is diffusion?
    The movement of particles from an area of high concentration to an area of low concentration.
  • What is thermal expansion?
    the spreading out of particles as they are heated
  • Why do some materials expand more than other types of matter as temperature changes?
    Different types of materials have different forces of attractions.
  • Particles move ______ in colder temperatures
    slower
  • What happens to pressure as temperature decreases?
    pressure decreases
  • What happens to pressure as volume decreases?
    pressure increases
  • Why does pressure increase as more particles are added to a container?
    With more particles, there are more collisions. More collisions = more pressure
  • What does exothermic mean?
    it releases heat