Edexcel IGCSE Physics 5.18 Temperature & gas molecule speed
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
5.18 Temperature and gas molecule speed question 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 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
All question bank results loaded