Experiment 1: Verifying Boyle’s Law
Boyle’s Law predicts an indirect relationship between P and V when the amount of gas and
temperature are held constant.
Before beginning the experiments, you should open the pinchcock and verify that the piston
slides freely. If not, pull the plunger all the way out and lubricate the black rubber piston rings
lightly all around their perimeter with silicone grease. Then push the plunger all the way in and
out a few times to spread the lubricant uniformly.
Remove the plunger from the syringe. Use the back side of the Vernier caliper to measure the
diameter of the O-rings on the piston. This is the inside diameter of the cylinder of the syringe,
which determines its cross-sectional area. Record the diameter calculate the area. This is the
area you will use to convert the weight of the mass into the pressure on the gas. Reinsert the plunger into the syringe.