KMT and Phase Changes

KMT, Phase Change and Thermal Energy

​Learning Targets:

PS.2c The kinetic molecular theory is used to predict and explain matter interactions.

PS.5b Energy is transferred and transformed.

Multiple Choice

According to the kinetic molecular theory, particles of matter

• are in constant motion.

• are only in motion as a liquid.

• have different densities.

• are always liquid.

Multiple Choice

These properties describe a ___.

• solid

• liquid

• gas

• plasma

Multiple Choice

Liquid to Gas

• Condensation

• Vaporization

• Sublimation

• Freezing

Multiple Choice

Liquid to Solid

• Condensation

• Vaporization

• Sublimation

• Freezing

Multiple Choice

Liquid particles have more energy than ___ particles.

• solid

• gas

Multiple Choice

The more energy that particles have, the ___ they move.

• slower

• faster

Multiple Choice

How does adding heat to a solid affect the particles of the substance?

• The particles in a solid do not move.

• The particles move slower.

• The particles move at the same rate as before the heat was applied.

• The particles move faster.

Multiple Choice

Select the temperature at which water freezes on the Kelvin scale.

• 0 K

• 32 K

• 273.15 K

Multiple Choice

At what temperature do nitrogen molecules move fastest?

• 350 K
• 300 K
• 250 K
• 200 K