Boyle's Law

Helium, Argon, and Nitrogen below 100oC are the best gases for this simulated experiment.

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

2. Move the piston to its highest position.  Click on Record .

3. Lower the piston in small increments (perhaps 0.2 ml), recording data for volumes down to the smallest value (0.4 ml).

4. Change the temperature OR load another gas OR re-load the same gas.  Record data as in 2-3 above.

5. Click on select graph type .

6. Select PV vs P (constant T) .  Click on graph It .

7. Note that the values of PV are essentially constant for the ideal gases (very small slopes).

8. If non-ideal gases Ethane or Carbon Dioxide have been studied, note that PV does not change appreciably at these pressures.

9. Record the information about the lines you have generated.  Calculate the number of moles:
     (n = intercept / RT) for each set of data.

Discuss your observations.