During an experiment to verify Boyle's law, the pressure of a fixed mass of gas was varied - Leaving Cert Physics - Question 2 - 2011
Question 2
During an experiment to verify Boyle's law, the pressure of a fixed mass of gas was varied. A series of measurements of the pressure $p$ and the corresponding volume... show full transcript
Worked Solution & Example Answer:During an experiment to verify Boyle's law, the pressure of a fixed mass of gas was varied - Leaving Cert Physics - Question 2 - 2011
Step 1
Draw a labelled diagram of the apparatus used in the experiment.
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Answer
The labelled diagram should include the following components:
A gas mass container,
A pressure gauge,
A scale for reading the volume,
A method for adjusting pressure or volume, such as a pump or valve.
Each component should be clearly labelled to show its function in the experiment.
Step 2
How was the pressure of the gas varied during the experiment?
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The pressure of the gas was varied using a pump to rotate a wheel or screw. Alternatively, a piston or plunger can be moved, or liquid levels can be adjusted in a reservoir or through a valve.
Step 3
Describe how the pressure and the volume of the gas were measured.
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Pressure was measured using a Bourdon gauge, while volume was measured by reading the scale on the gas container or syringe.
Step 4
Why should there be a delay between adjusting the pressure of the gas and recording its value?
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There should be a delay to allow the gas to cool and reach thermal equilibrium, which ensures accurate measurements.
Step 5
Draw a suitable graph to show the relationship between the pressure and the volume of a fixed mass of gas. Explain how your graph verifies Boyle's law.
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To graph the data:
Label the axes correctly with pressure on the x-axis and the inverse volume on the y-axis.
Plot the points based on the given data.
Draw a straight line through the origin, indicating an inverse relationship between pressure and volume, consistent with Boyle's law, which states that the product of pressure and volume remains constant for a fixed mass of gas.
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