Models — Kinetic Particle Theory Flashcards
what is a melting and boiling point?
Melting Point: The temperature at which a solid begins to melt and become a liquid
Boiling Point : The temperature at a liquid begins to boil and become a gas
Arrangement and Movement of a Solid
The particles of a solid are closely packed in an orderly pattern with very little space between them.
It vibrates and rotates about their fixed position.
Energy Level: Low
Definite shape as the particles cannot move freely.
Fixed volume as particles are closely packed and there is little/almost no space between particles.
Arrangement and Movement of a Liquid
The particles of a liquid are loosely packed in a disorderly manner with slightly more spaces between them than in a solid.
The particles slide over one another
Energy Level: Moderate
No definite shape, but takes the shape of the container as particles are able to move around.
Fixed volume as particles are closely packed and there is little space between them.
Arrangement and Movement of a Gas
The particles of a gas are very far apart from one another in a disorderly manner.
The particles move rapidly and freely in all directions.
Energy Level : High
No definite shape, and takes the shape of the container as particles are able to move about.
No fixed volume. Gases can be compressed. There are large spaces between particles, hence, particles can come closer or move further away.
Changes in state
what do u call a change from solid to gas and a change from gas to solid
Sublimation and Deposition [respectively]
State the similarities and differences between boiling and evaporation
Similarities
Both involves the change from liquid to gas.
Differences
Evaporation: Occurs at the surface only. Evaporation occurs because liquids at the surface have more energy.
Occurs at any temperature
Boiling: Occurs throughout the liquid. Bubbling observed.
Only occurs at a fixed temperature.
