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The students should understand that ideal gases are described in terms of the kinetic theory and constitute a modelled system used to approximate the behaviour of real gases


Here are experiments our science specialists have selected to support this IB* topic.

Behavior of a Gas

Experiment #1 from Advanced Physics with Vernier — Beyond Mechanics

In this experiment, you will

  • Collect pressure vs. volume, pressure vs. number, and pressure vs. temperature data for a sample of air in an enclosed container.
  • Determine relationships between these pairs of variables.
  • Determine a single expression relating these variables.
  • Determine the constant of proportionality for the relationship between pressure, volume, and temperature.
  • Use kinetic molecular theory (KMT) to model the behavior of the gas at various points on each graph.

Educational Standard
International Baccalaureate (IB) 2025
B The particulate nature of matter
B.3 Gas Laws
Standard level and higher level

* The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.