Vocabulary
Phase Changes
Energy & Heat
Particle Motion
Heat Curve
100

This state of matter has a definite volume but no definite shape.

Liquid

100

The phase change when a solid turns into a liquid.

melting

100

This is released to the surroundings when water vapor undergoes condensation to form liquid water.

Thermal Energy

100

The movement of particles in a solid.

vibrating in a fixed position

100

How many states of matter are represented on the graph? Name them.

Two; Liquid and Gas

200

This type of solid has particles that are randomly scattered.

Amorphous solid

200

The phase change when a gas turns into a liquid.

condensation 

200

What is thermal energy doing during to the particles on the horizontal flat line on a heating curve. What does the horizontal line represent?

Particles are breaking apart and a change in state of matter

200

Particles in a gas compared to a liquid or solid.

moving randomly and rapidly with large spaces between them

200

How many phase changes/changes in states are represented on the graph?

1

300

The total energy of all the particles within an object.

Thermal Energy

300

The phase change where a gas turns directly into a solid, forming frost.

deposition

300

Particles with more mass will move this way compared to particles with less mass, assuming they have the same amount of kinetic energy.

Slower

300

This term describes a fluid's resistance to flow (e.g., honey has a high one).

viscosity

300

How long did the vaporization process take?

10 minutes

400

This type of solid, like ice, has particles arranged in a specific, repeating pattern.

Crystalline Solid

400

The phase change where a solid turns directly into a gas, like dry ice.

sublimation

400

This process, which is the opposite of melting, requires a substance to release thermal energy to the surroundings.

Freezing

400

The reason a gas has no definite volume and will fill its entire container.

particles have enough energy to overcome all attractive forces and break apart

400

From the time it started heating, how many minutes did all of the liquid acetone take to become a gas?

30 minutes

500

The temperature at which a crystalline solid changes into a liquid.

melting point

500

The process that is the opposite of melting.

freezing

500

This property, which is a measure of the average kinetic energy of the particles, does not change during a phase change.

Temperature

500

For a pure substance, the reason its melting point and freezing point are the same temperature

The temperature, the solid and liquid states are in equilibrium

500

Name all six changes is sates (phase changes) and what states they between. 

  • Melting: Solid → Liquid

  • Freezing: Liquid → Solid

  • Vaporization (Boiling/Evaporation): Liquid → Gas

  • Condensation: Gas → Liquid

  • Sublimation: Solid → Gas (skips the liquid phase)

  • Deposition: Gas → Solid (skips the liquid phase)

M
e
n
u