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Edexcel IGCSE Physics 5.19 Kelvin Temperature and Kinetic Energy Questions

Calculate gas temperature from particle mass and mean speed, using the supplied proportionality between mean kinetic energy and kelvin temperature.

Syllabus
First assessment 2019
Course
Physics 4PH1

Exam points

  • Sketch average molecular kinetic energy against kelvin temperature as a straight line through the origin.
  • Apply Eₖ = ½mv², then rearrange the given KE–kelvin relationship to calculate gas temperature.

Edexcel IGCSE Physics 5.19 Kelvin Temperature and Kinetic Energy Questions question 1

[Maximum number: 2]

A student uses a computer simulation to investigate the motion of particles in a gas.
He records the pressure of the gas and the mean speed of the particles in the gas at different temperatures.

The graphs show his results.

Graph 1

Graph 1

Graph 2

Graph 2

The student then calculates the kinetic energy of a single gas particle at each temperature.

On the axes, sketch a graph of the average kinetic energy of the gas particles against temperature in kelvin.

Figure for Question Edexcel IGCSE Physics 5.19 Kelvin Temperature and Kinetic Energy Questions question 1 — Edexcel IGCSE Physics
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