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IB Chemistry SL 1.1.3 Temperature and Kinetic Energy Questions

Relate kelvin temperature to average particle kinetic energy and explain how heating changes particle motion and gas behaviour.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Relate absolute temperature in kelvin to average particle kinetic energy and use KE or velocity relationships to predict factor changes.
  • Explain how heating changes particle motion, collision frequency and gas volume or pressure while distinguishing temperature effects from changes in amount or state.

IB Chemistry SL 1.1.3 Temperature and Kinetic Energy Questions question 1

[Maximum number: 1]

What happens to the average kinetic energy, KE , of the particles in a gas when the absolute temperature is doubled?
KE=12mv2\mathrm{KE}=\frac{1}{2} \mathrm{mv}^{2}

A

Increases by a factor of 2

B

Decreases by a factor of 2

C

Increases by a factor of 4

D

Decreases by a factor of 4

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