Vérification de la Loi de Boyle

Démonstration de la relation inverse entre pression et volume

Gas Laws Intermediate (High School) 40 min ~$15,00

Objectif

Vérifier la loi de Boyle (P₁V₁ = P₂V₂) en mesurant le volume d'un gaz emprisonné à différentes pressions.

Contexte

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.

Avertissements de sécurité

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

EPI requis

goggles

Matériaux

  • 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)

Équipement

Retort stand and clamp Weights or books for applying pressure Ruler

Procédure

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

Résultats attendus

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.

Nettoyage

Return apparatus to storage. Dispose of graph paper drafts.

Détails

Catégorie
Gas Laws
Difficulté
Intermediate (High School)
Durée
40 min
Coût estimé
$15,00
Étapes
5
Matériaux
4

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Frequently Asked Questions

What is the objective of Vérification de la Loi de Boyle?
Vérifier la loi de Boyle (P₁V₁ = P₂V₂) en mesurant le volume d'un gaz emprisonné à différentes pressions.
How difficult is Vérification de la Loi de Boyle?
This experiment is rated as Intermediate (High School). It takes approximately 40 minutes to complete.
What safety precautions are needed for Vérification de la Loi de Boyle?
Key safety precautions include: Do not apply excessive pressure to glass apparatus; Ensure all connections are airtight.
What materials are needed for Vérification de la Loi de Boyle?
The main materials required are: Boyle's law apparatus or large syringe, Pressure gauge, Rubber tubing, Graph paper.
What results should I expect from Vérification de la Loi de Boyle?
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.