8 original questions from New Regents. The worksheet, answer key, and browser practice are free.
Boyle’s Law 4 questions
Boyle’s Law
New Regents original practice • Name: ____________________ Date: __________ Show your work for written answers.
For a fixed amount of gas at constant temperature, use P1V1 = P2V2. Pressures are absolute.
Question 1
A gas occupies 40 mL at 100 kPa. Its volume is reduced to 20 mL at constant temperature. What is its new pressure?
- 50 kPa
- 100 kPa
- 160 kPa
- 200 kPa
Question 2
A sealed gas occupies 3.0 L at 120 kPa. Calculate its volume at 180 kPa if the temperature stays constant. Show your setup.
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Question 3
Explain why the pressure of a fixed gas sample rises when its volume decreases at constant temperature.
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Question 4
Which variables must remain fixed to apply Boyle’s law to a gas sample?
- Pressure and volume
- Temperature and amount of gas
- Temperature and pressure
- Volume and amount of gas
Sealed Piston 4 questions
Sealed Piston
Use the information below to answer the questions.
A model piston contains a fixed amount of gas. The gas returns to the same temperature before each reading.
| Trial | Volume (mL) | Pressure (kPa) |
|---|---|---|
| 1 | 60 | 100 |
| 2 | 50 | 120 |
| 3 | 40 | 150 |
Question 5
Calculate PV for trials 1 and 3. Include units and state how the two products compare.
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Question 6
Which additional reading is consistent with the table at the same temperature?
- 30 mL and 200 kPa
- 30 mL and 100 kPa
- 75 mL and 125 kPa
- 80 mL and 150 kPa
Question 7
Which property stays the same from trial 1 to trial 3?
- Distance between the piston and the bottom
- Frequency of particle impacts on the walls per unit area
- Average kinetic energy of the gas particles
- Pressure on the piston
Question 8
A seal fails and some gas escapes before the next reading. Explain why the original PV product should no longer be used to predict its pressure.
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