Boyle's Law Verification

Demonstrating the inverse relationship between pressure and volume

Gas Laws Intermediate (High School) 40 min ~$15.00

Objective

Verify Boyle's law (P1V1 = P2V2) by measuring the volume of a trapped gas at different pressures.

Background

Boyle's law states that at constant temperature, the pressure and volume of a gas are inversely proportional. This experiment uses a closed syringe or J-tube manometer to measure gas volume at different pressures and confirm the relationship.

Safety Warnings

  • Do not apply excessive pressure to glass apparatus
  • Ensure all connections are airtight

Required PPE

goggles

Materials

  • Boyle's law apparatus or large syringe (1)
    60 mL syringe works
  • Pressure gauge (1)
    Or manometer
  • Rubber tubing (30 cm)
  • Graph paper (2 sheets)

Equipment

Retort stand and clamp Weights or books for applying pressure Ruler

Procedure

1

Set up the Boyle's law apparatus with a known volume of trapped air. Record the initial pressure and volume.

5 min
2

Increase the pressure by adding mercury or pushing the syringe. Record the new pressure and volume.

5 min Do not force the syringe
3

Take at least 8 readings at different pressures, both increasing and decreasing.

15 min
4

Calculate PV for each reading. They should all be approximately equal.

5 min
5

Plot P vs V (hyperbola) and P vs 1/V (straight line through origin) graphs.

8 min

Expected Results

The product PV should remain approximately constant (within 5% experimental error). The P vs 1/V graph should be a straight line through the origin, confirming the inverse proportionality.

Cleanup

Return apparatus to storage. Dispose of graph paper drafts.

Details

Category
Gas Laws
Difficulty
Intermediate (High School)
Duration
40 min
Est. Cost
$15.00
Steps
5
Materials
4

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Frequently Asked Questions

What is the objective of Boyle's Law Verification?
Verify Boyle's law (P1V1 = P2V2) by measuring the volume of a trapped gas at different pressures.
How difficult is Boyle's Law Verification?
This experiment is rated as Intermediate (High School). It takes approximately 40 minutes to complete.
What safety precautions are needed for Boyle's Law Verification?
Key safety precautions include: Do not apply excessive pressure to glass apparatus; Ensure all connections are airtight.
What materials are needed for Boyle's Law Verification?
The main materials required are: Boyle's law apparatus or large syringe, Pressure gauge, Rubber tubing, Graph paper.
What results should I expect from Boyle's Law Verification?
The product PV should remain approximately constant (within 5% experimental error). The P vs 1/V graph should be a straight line through the origin, confirming the inverse proportionality.