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Edexcel IGCSE Physics 5.18 Temperature and Gas Molecule Speed Questions

Practise linking temperature changes to molecular kinetic energy, gas particle speed and pressure effects in containers or graph data.

Syllabus
First assessment 2019
Course
Physics 4PH1

Exam points

  • explain higher gas pressure using faster particles and more frequent wall collisions
  • read a speed value from a temperature-speed curve of best fit
  • describe cooling as particles moving more slowly with lower kinetic energy

Edexcel IGCSE Physics 5.18 Temperature and Gas Molecule Speed Questions question 1

[Maximum number: 1]

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.

Using the curve of best fit on graph 2, determine the mean speed of a gas particle when the gas temperature is 100 degrees C.

mean speed = ............ m/s

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