PHET: Phase Change LAB

What atoms & molecules are you exploring in this simulation? Identify which are atoms and which are molecules.

• Atoms: H, O, C; Molecules: H2O, CO2
• Atoms: O, Ne, Ar; Molecules: H₂O

• Atoms: N, S, Cl; Molecules: O2, CH4
• Atoms: P, K, Ca; Molecules: C6H12O6, NH3

Tags

NGSS.MS-PS1-1

What temperature are each of the atoms & molecules starting at? (In other words, where is the thermometer in the sim and what units is it in?) Fill out the table below:

• 14, 43, 27, 146 (°K)

• 0-5 degrees Celsius (°K)

• 13, 15, 157, 23 (°K)

• 30-35 degrees Celsius (°C)

Starting with neon, how do you add more particles?

Several things happen as you add more particles, what are they? a. Temperature: (Include initial and final temperatures) b. Describe what happens to the particles as you add more particles: c. On the right hand side is a diagram called “phase diagram”, what is happening to the red dot as you add more particles? d. Pressure: e. Do you think this was a phase change? Why or why not?

Tags

NGSS.HS-PS1-5

What are other ways in which you can change the phase of argon without adding more particles?

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

Reset the simulation, select argon again and pick one of the ways above that you can change the phase of argon.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

In addition to the phase changing, what happens to the temperature?

Tags

NGSS.MS-ESS2-6

NGSS.MS-PS3-4

NGSS.MS-PS3-5

In addition to the phase changing, what happens to the particles?

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In addition to the phase changing, what happens to the red dot on the phase diagram?

Tags

NGSS.HS-PS3-4

In addition to the phase changing, what happens to the pressure?