IB Chemistry SL 1.5.1 Ideal Gas Model Assumptions

Practise using the ideal-gas particle model rather than memorising a graph shape. Treat particles as moving points with negligible volume and no intermolecular forces, assume…

Syllabus
First assessment 2025
Objective
1.5.1
Level
SL

Exam points

  • state negligible particle volume, absent intermolecular forces and elastic collisions
  • identify an inverse pressure-volume graph for a fixed amount at constant temperature
  • use particle collisions to explain how a volume change alters gas pressure

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