Boyle's Law

Preston S.

What is Boyle's Law?

Boyle's law is an experimental gas law that is used to describe the relationship between the volume and pressure of gas. it says that as the pressure on a gas increase the volume of the gas and as the pressure of a gas decrease the volume of the gas increases. this relationship is shown in the equation P1 x V1 = P2 x V2

Objectives, Materials, and Procedures


1. Use gas pressure sensor and gas syringe to measure the pressure of air at different volumes.

2. Use the date to be able to determine the relationship between pressure and gas.

3. Describe the relationship between volume and pressure using the mathematical formula.

4. Use the results here to be able to predict the pressure at other volumes.


1. Computer

2. Gas syringe (20 mL)

3. gas sensor and computer interface

4. Logger Pro software


1. Prepare the Gas Pressure Sensor and an air sample for data collection. do this by connecting the sensor to your computer and connecting the syringe to the sensor with the syringe being at the 10 mL mark.

2. now click collect, make sure you watch the syringe make sure you are getting the best data possible. collect the date for pressure VS volume. it is best if one person deals with the syringe while another deals with the computer.

4. do this tell your reading is stable then click keep, remember you are adding .8 to the volume for the total number

5. you will repeat steps 1 - 4 for 7.0 mL, 9.0 mL, 11.0 mL, 13.0 mL, 15.0 mL, and 17.0 mL remembering to add .8 to each one. once this is done hit stop.

6. In your data table record the pressure and volume pairs you see on the graph the date of pressure and volume and decide how you think these to respond to each other.

8. Once this is done add a line of best fit, by using the "best fit" button in the corner.

9.Once you have the graph is an inverse or direct relationship you can print it and go on to answering the questions.


During the I had the job of manning the syringe. noticed that the syringe was harder to push forward while adjusting it and easier to pull back. I also noticed that on the graph the lines did seem to have an inverse relationship. and every test showed the same type of relationship.

My data Table

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My Graph

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I learned that Boyle's law is an experimental gas law used to the inverse relationship between pressure and volume. I learned that has the pressure put onto a gas goes up that gas's volume goes down, and that as the pressure on a gas goes down its volume goes up. I also learned that the equation for Boyle's Law is V1/P1 = V2/P2.

Molecular Drawing

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Explanation of Drawing

Both sides have the exact same amount of circles, but the first side has a lot more pressure so the volume or space that the circles take up is dramatically cut down. The other side the opposite because the pressure is very low so it gives the atoms (circles) room to spread out and increase their volume. this is because gas has no volume and just takes up the volume of whatever space it's in.