UTF-8
TELS Phases of Matter (Mar06)
204255204
Gases
What does a gas look like at the atomic scale?
Where have the atoms traveled?
As each model runs, follow one particle for a time. Repeat for different particles.
<Previous><Index><Next>
1
8.0
8.0
20true102 102 255
16true6 51 51
11
1
8.0
8.0
14
8.0
8.0
14true
16true
14
28.0
8.0
14
146 50 50
1
28.0
8.0
org.concord.modeler.PageTextBox
300.0
250.0
<html>
<head>
</head>
<body>
<p>
Below are models of three kinds of gases.
</p>
<p>
One is a gas of atoms, one is a gas of molecules (steam, water in gas
form), and one is a mix of atoms and molecules.
</p>
<p>
Run the models and watch them carefully.
</p>
<p>
The dashed lines represent atom pairs that are close enough to attract
each other.
</p>
</body>
</html>
-40c36
Lowered Bevel
org.concord.modeler.PageTextBox
340.0
260.0
<html>
<head>
</head>
<body>
<img src="color_jumping_people_sm.jpg">
</body>
</html>
-330034
6 50 50
8.0
8.0
1
org.concord.mw2d.activity.AtomContainer
Gases$0.mmlfalse
1
1
org.concord.modeler.PageRadioButton
Helium
A gas of atoms
true
org.concord.mw2d.models.MolecularModel
0
1183941194632
Execute MW script
org.concord.modeler.PageRadioButton
Steam
Water as a gas
org.concord.mw2d.models.MolecularModel
0
1183941194632
Execute MW script
org.concord.modeler.PageRadioButton
Mix
org.concord.mw2d.models.MolecularModel
0
1183941194632
Execute MW script
14
org.concord.modeler.PageCheckBox
Show Forces
Dotted lines represent forces that exist between neighbors
true
org.concord.mw2d.models.MolecularModel
0
Show van der Waals interactions
1
org.concord.modeler.PageTextField
West
550
24
<html>
Stop the helium model and estimate how many dashed lines there are per atom.
</html>
One or two.
org.concord.modeler.PageTextArea
500
100
<html>
What is similar about the arrangement of all gas atoms and molecules?
</html>
They are randomly placed and far apart.
true
org.concord.modeler.PageTextArea
500
100
<html>
Describe the motion of atoms and molecules in a gas.
</html>
They travel far and randomly.
org.concord.modeler.PageTextArea
500
100
<html>
How can you identify atoms in a model that are part of a gas?
</html>
They are uniformly and randomly distributed.
1
14255 0 0
1
14
1
14
1451 0 51
14
14index.cml
14
1451 0 51
14
14255 255 255