IB Physics SL B.3.3 Ideal Gas Model

Practise stating ideal-gas assumptions and linking molecular collisions and kinetic energy to measurable pressure and temperature while contrasting the model with real gases.

Syllabus
First assessment 2025
Objective
Level
SL

Exam points

  • state random motion, negligible particle volume and forces, and perfectly elastic collisions
  • link pressure to momentum transfer at walls and absolute temperature to mean kinetic energy
  • contrast real gases through finite molecular size, intermolecular forces, liquefaction or non-ideal data

B.3.3—Ideal gas model question 1

[Maximum number: 2]

This question is in two parts. Part 1 is about ideal gases and specific heat capacity. Part 2 is about simple harmonic motion and waves.
Part 1 Ideal gases and specific heat capacity

State two assumptions of the kinetic model of an ideal gas.

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