Phase Change and Heat Tech Review

What type of change is a phase change?

• Chemical Change
• Physical Change
• Endothermic Chemical Reaction
• Exothermic Chemical Reaction

Which below is NOT true about Vaporization?

• Represents both Boiling and Evaporation
• Changes a liquid to a gas
• Needs to gain Thermal Energy
• Needs to lose Thermal Energy

In this phase change graph, which location is most likely where a phase change is occurring?

• A
• B
• C
• D

Which phase change is being described: Particles move slower as they lose thermal energy, going from a gas to a liquid!

• Freezing
• Condensation
• Melting
• Vaporization

Which phase change is being described: Particles move faster as they gain thermal energy, going from a Solid to a Liquid!

• Freezing
• Melting
• Vaporization
• Condensation

Looking at the phase change graph, what is surprisingly NOT changing during a phase change? Hint: Look at the X and Y axis!

• Thermal Energy

• State of Matter

• Temperature

• Heat

During a phase change thermal energy is constantly being gained or lost.  However the Temperature stops changing, why is this?

• Temperature never changes with thermal energy.
• The thermal energy is being used to change the particle arrangement.
• Temperature does change during a phase change.
• The thermal energy is being destroyed by the phase change.

Sublimation is a very rare form of phase change, where the matter changes from:

• Solid to Liquid
• Liquid to Gas
• Gas to Solid
• Solid to Gas

What is the definition of a phase change?

• A measurement of the average kinetic energy of the particles in a substance.
• The movement of thermal energy between two substances of different temperatures.
• The motion of the atoms and molecules that make up a substance.
• A physical change where a substances goes from one state to another by gaining/losing thermal energy.

Technologies such as refrigerators, air-conditioning units, and heating units all force thermal energy to go in what direction?

• Higher to Lower Temperature
• Lower to Higher Temperature