Charles' Law

Helium, Argon, and Nitrogen are the best gases for this simulated experiment.

1. Select a temperature and a gas. Click on Show Data .

2. Click on pressure control to show ON.

3. Move the piston up or down until you reach a limiting value.  Click on Record.

4. Change the volume in small increments (0.2 ml).  Record data as in 2-3 above.

5. Turn pressure control to OFF.  Set the temperature to 0 oC.  Move the piston to 1.6 L or less (do NOT click Record) so that the pressure is different from the previous experiment.

6. Repeat steps 2-4 above.

7. Select a different gas and repeat steps 2-6 above.

8. Click on select graph type.  Select V vs t (constant P) .

9. Note that all of the lines are converging at a low temperature.

10. Record the information about the lines you have generated.  Calculate the temperature for V = 0:
       {tV=0 = - intercept / slope} for each set of data.

     Discuss your observations.