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Phase Change: Gases
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<font face="Verdana, Arial, Helvetica, sans-serif" size="7" color="#FFFFFF"><strong>Evaporation</strong>
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<td><img src="atomMainIdea.png" width="98" height="58"></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="4">Before you explore evaporation, you need first to find out what the primary phases -- the states of matter (gas, liquid and solid) -- look like at the atomic level. First, what does a <b>gas</b> look like at the atomic scale?</font></td>
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<font color="#a65d2c" face="Verdana, Arial, Helvetica, sans-serif" size="5"><strong>Atomic
Motion in Gases</strong></font>
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<font face="verdana,arial,helvetica">Run the models of two types of gases
and watch them carefully. </font>
<p>
<font face="verdana,arial,helvetica">The dashed lines represent atom
pairs close enough to attract each other. Select "Show Interactions".
Estimate the average number of dashed lines in the model.</font>
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<p>
<font face="verdana,arial,helvetica">Click the "Randomly pick an atom
and show its trajectory" button to follow an atom.</font>
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<input type="submit" name="submit" script="script:page:0:message controllerPanel.html" value="How to use simulation controls">
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Gas 1
Show gas 1.
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Gas 2
Show gas 2.
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Show Interactions
Dotted lines represent forces that exist between neighbors
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Show van der Waals interactions
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Randomly pick an atom and show its trajectory.
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Execute MW script
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Mark atoms within a rectangle at the center of the box.
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Execute MW script
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<font color="#a65d2c" face="Verdana, Arial, Helvetica, sans-serif" size="5"><strong>Questions</strong></font>
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<strong><font face="Arial, Helvetica, sans-serif" size="4">Describe the
motion of atoms and molecules in a gas. </font></strong>
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<strong><font face="Arial, Helvetica, sans-serif" size="4">How are
the behavior and arrangements of gas molecules similar to and
different from soccer players running in the field? </font></strong>
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<img src="soccer.jpg">
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<a href="../liquid/liquid.cml"><font><img height="26" width="59" src="next.jpg" border="0">
</font></a>
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