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A student used the equipment in Figure 9 to investigate how the pressure of a gas varies with the volume of the gas - AQA - GCSE Physics - Question 6 - 2020 - Paper 1
Question 6
A student used the equipment in Figure 9 to investigate how the pressure of a gas varies with the volume of the gas. The syringe is filled with air. Table 2 shows ... show full transcript
Worked Solution & Example Answer:A student used the equipment in Figure 9 to investigate how the pressure of a gas varies with the volume of the gas - AQA - GCSE Physics - Question 6 - 2020 - Paper 1
Step 1
Describe how the student could use the equipment in Figure 9 to obtain the data shown in Table 2.
Answer
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Record the Initial Volume of Air: Start by noting the initial volume of air in the syringe, which should be set to a specific measurement according to the first volume listed in Table 2.
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Record the Initial Pressure: Observe and record the initial pressure indicated by the pressure gauge before making any adjustments to the volume.
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Push the Plunger of the Syringe: Gradually push the plunger of the syringe to decrease the volume of air. Ensure to maintain a consistent force during this process for accuracy.
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Read the New Pressure: After adjusting the volume, read the new pressure displayed on the gauge and record this value.
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Record the New Volume of the Air: Note the new volume corresponding to the displacement made by pushing the plunger.
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Repeat for Different Volumes: Repeat these steps for each volume listed in Table 2 to gather the necessary data.
Step 2
Describe what happens to the pressure of the air when the volume of the air is halved.
Answer
When the volume of the air is halved, the pressure of the air increases. According to Boyle's Law, which states that pressure and volume are inversely proportional for a given amount of gas at constant temperature, halving the volume of the gas will lead to a doubling of the pressure, assuming temperature remains constant.
Step 3
Which two properties of the air particles would change if the temperature increased?
Answer
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Kinetic Energy: As temperature increases, the kinetic energy of the air particles will also increase, leading to faster movement of the molecules.
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Speed: Similarly, the speed of the air particles will increase with rising temperature, as the particles gain energy and move more rapidly.