Boyle's Law Investigation

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Bolyes Law

Aim:

To prove Boyles Law

Plan:

I plan to set up my experiment with a bicycle pump attached to the Borden gauge and have a ruler attached to the side of the Borden gauge. I will then pump the pressure up taking readings from the pressure gauge and the ruler. I will start the experiment at 100 atm, which is earth's atmospheric pressure, and I will go up to 400 atm. I will take the reading at every 50 atm. I will need to use these apparatus:-

* Bicycle pump

* Borden Gauge

* Ruler

* Sellotape

Fair Test:

I will need the ruler so that I can measure the volume of the Borden gauge more accurately as the readings on the side of the Borden only go up in cm3. It must also be stuck on to the side of the Borden gauge straight down and not at angle. If it is at an angle then it would be an unfair test. I must also remember to read both the reading off of the pressure and the volume straight on so that the test is not unfair in that way. As the Borden gauge uses water to allow you to read the volume, I must remember to read from the bottom of the meniscus and take all my readings from the bottom of the meniscus. I will also do the experiment twice so that I can take an average of the two and make it more accurate that way. I could also try and keep the temperature around the Borden gauge the same so that the experiment is fair. Once I have all of my results I will write them down in a table and draw two graphs. One will be a pressure, volume graph and the other will be pressure, 1/volume graph. The Borden gauge has been made so you can't tell the volume at 100 atm, this means I will have to guess which could lead to some inaccuracy.
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Pressure

V1

V2

Vav

/V

Safety:

I shouldn't pump up the experiment to high as it could break the pump and other parts of the experiment.

Prediction:

From my studies in class, I know that Boyles law states that:-

The volume of a fixed mass of gas is inversely proportional to its pressure, provided the temperature of the gas remains constant.

This means that as the pressure increases the volume decreases. Knowing this I predict that as I pump more pressure into the apparatus, the volumes ...

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