Ideal Gas Law – PhET Simulation by malj

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									                                 Ideal Gas Law – PhET Simulation

Introduction
In this simulation you will look at the motion of gas particles to describe the relationships that exist
between pressure, volume, temperature, number and type of atoms in a contained gas.

Procedure
1. Open: http://phet.colorado.edu/simulations/index.php?cat=Heat_and_Thermo
2. Select - gas properties simulation – run now!
3. Select constant volume
3. Pump handle just a little bit – wait for pressure to stabilize (gas well mixed)
   Note temperature and pressure
   Add more atoms by pumping some more. What happens to the temperature and pressure?

   _________________________________________________________________________________

   Explain your answers in terms of mechanics of the gas atoms

   _________________________________________________________________________________

   _________________________________________________________________________________

   Sketch a graph of how you think the pressure of the gas in the container depends on the number of
   atoms in the container.



                           P




                                                               N

   Describe a real world situation that would be described by the graph you drew.

   ___________________________________________________________________________________

   ___________________________________________________________________________________


4. Press reset.
5. Put 40 “heavy species” atoms in the chamber at constant volume. Note the temperature and gas pressure
   when well mixed.
   Press Reset
   Put 40 “Light species” atoms in the chamber at constant volume. Note the temperature and gas pressure
   when well mixed.

Compare the temperature and pressure for equal numbers of heavy or light gas atoms in the container

   ___________________________________________________________________________________
      Explain your answers in terms of mechanics of the gas atoms

      _________________________________________________________________________________

      _________________________________________________________________________________


6. Press reset
7. Select constant volume
8. Put 100 gas atoms in the container – wait for pressure to stabilize.
9. Now select constant pressure
10. Pull arrow on heat control down, removing heat from the container. What happens to the temperature
     and volume?
   _________________________________________________________________________________

      Explain your answers in terms of mechanics of the gas atoms

      _________________________________________________________________________________

      _________________________________________________________________________________

      Sketch a graph of how you think the volume of the gas in the container depends on the temperature of
      the gas in the container.



                             V




                                                              T (oK)

      Describe a real world situation that would be described by the graph you drew.

      ___________________________________________________________________________________

      ___________________________________________________________________________________


11.    Press reset
12.    Select constant volume
13.    Put 100 gas atoms in the container – wait for pressure to stabilize.
14.    Pull arrow on heat control down or up, removing or adding heat to the container. What happens to the
       temperature and pressure?

      _________________________________________________________________________________

      Explain your answers in terms of mechanics of the gas atoms

      _________________________________________________________________________________

      _________________________________________________________________________________
      Sketch a graph of how you think the pressure of the gas in the container depends on the temperature of
      the gas in the container.



                             P




                                                              T (oK)

      Describe a real world situation that would be described by the graph you drew.

      ___________________________________________________________________________________

      ___________________________________________________________________________________


15.    Press reset
16.    Select constant temperature
17.    Put 100 gas atoms in the container – wait for pressure to stabilize.
18.    Click on the handle on the container and make the container smaller. What happens to the
       volume and pressure?

      _________________________________________________________________________________

      Explain your answers in terms of mechanics of the gas atoms

      _________________________________________________________________________________

      _________________________________________________________________________________



      Sketch a graph of how you think the pressure of the gas in the container depends on the volume of
      the container.



                             P




                                                              V

      Describe a real world situation that would be described by the graph you drew.

      ___________________________________________________________________________________

      ___________________________________________________________________________________

								
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