WorksheetsPHET: Phase Change LAB
Total questions: 14
Worksheet time: 37mins
What atoms & molecules are you exploring in this simulation? Identify which are atoms and which are molecules.
Atoms: O, Ne, Ar; Molecules: H2O
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)
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?
What are other ways in which you can change the phase of argon without adding more particles?
Reset the simulation, select argon again and pick one of the ways above that you can change the phase of argon.
In addition to the phase changing, what happens to the temperature?
In addition to the phase changing, what happens to the particles?
In addition to the phase changing, what happens to the red dot on the phase diagram?
In addition to the phase changing, what happens to the pressure?
What made you think a phase change was happening?
Do the oxygen particles in the simulation represent what you know about oxygen’s phase at ______ Fahrenheit/298 K? Why or why not?
Where is the red dot in the phase diagram image of the simulation?
Take into account the exploration that you have just done with oxygen in the simulation: given the following screenshots of the phase diagrams, what phase is each position of the red dot? (How do you know? Describe the particles.)
