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The Pressure-Volume Relationship of Gases: Boyle’s Law

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The Pressure-Volume Relationship of Gases: Boyle’s Law


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You will experimentally determine the relationship between pressure and volume as stated in Boyle’s law.

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Now You Know

After completing this tutorial, you will be able to complete the following:

  • Describe Boyle’s law as the principle stating, “The volume of a fixed amount of a gas is inversely proportional to its pressure at constant temperature.”
  • Identify PV = constant as the equation for Boyle’s law.
  • Describe pressure as an amount of force acting upon a unit area.
  • Explain that gases spontaneously move from areas of high pressure to areas of low pressure.
  • Explain that decreasing the volume of a gas causes an increase in molecular collisions, which results in an increase in pressure.

Everything You'll Have Covered

Gas particles are in constant motion. Pressure and volume are influenced by this motion under conditions that are constantly changing. When temperature in Kelvin is held constant, pressure and volume have an inverse relationship. This means that as pressure increases, the volume of a sample decreases. Similarly, as pressure decreases, volume increases. The equation to show this relationship, called Boyle's law, is . This equation shows that the conditions of pressure and volume change while temperature is kept constant.

Tutorial Details

Approximate Time 20 Minutes
Pre-requisite Concepts Learners should have working knowledge of the kinetic molecular theory and how pressure functions as a result of particle motion.
Course Chemistry
Type of Tutorial Experiment
Key Vocabulary Boyle, collision, experiment