Verificação da Lei de Boyle

Demonstração da relação inversa entre pressão e volume

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

Objetivo

Verificar a lei de Boyle (P₁V₁ = P₂V₂) medindo o volume de um gás aprisionado em diferentes pressões.

Contexto

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.

Avisos de segurança

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

EPI necessário

goggles

Materiais

  • 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)

Equipamentos

Retort stand and clamp Weights or books for applying pressure Ruler

Procedimento

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

Resultados esperados

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.

Limpeza

Return apparatus to storage. Dispose of graph paper drafts.

Detalhes

Categoria
Gas Laws
Dificuldade
Intermediate (High School)
Duração
40 min
Custo estimado
$15,00
Passos
5
Materiais
4

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Frequently Asked Questions

What is the objective of Verificação da Lei de Boyle?
Verificar a lei de Boyle (P₁V₁ = P₂V₂) medindo o volume de um gás aprisionado em diferentes pressões.
How difficult is Verificação da Lei de Boyle?
This experiment is rated as Intermediate (High School). It takes approximately 40 minutes to complete.
What safety precautions are needed for Verificação da Lei de Boyle?
Key safety precautions include: Do not apply excessive pressure to glass apparatus; Ensure all connections are airtight.
What materials are needed for Verificação da Lei 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 Verificação da Lei 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.