Graph and Simulation Review

This graph represents water in each phase except..

• Solid

• Liquid

• Gas

The long, flat line at the top of the graph represents...

• Melting

• Freezing

• Vaporization

• Condensation

Temperature stays constant during a phase change

• True

• False

Kinetic energy and temperature are ________ related.

• directly

• inversely

Do the particles in two materials at the same temperature always move at the same speed?

• Yes, they do

• No, they do not

At what temperature do all particles stop moving? Select TWO answers.

• 0 Kelvin

• 0 Celsius

• -273 Kelvin

• -273 Celsius

Phase changes are ____________ changes.

• chemical

• physical

We know that the water boiling in a pot is H₂O. What elements or compounds are present in the steam that is rising off of the pot?

• Hydrogen gas

• Oxygen gas

• Water in gas form

• All of these answers are correct

Two gases, each at 100 K, are mixed together. Which one gains energy from the other?

• Whichever one has faster moving particles

• Whichever one has slower moving particles

• Neither, because they have equal kinetic energy