The motion of gas particles

Objective:

To describe the motion of gas particles

Effect of temperature on the motion of gas particles

Virtual experiment 

In this virtual experiment, you will observe the motion of gas particles and how they change when external forces are applied.

The figure below shows the functions each button performs.

Workflow:

Step 1. When the virtual simulation is turned on, you have two sections: introduction and laws. Open the introduction section and you will start working there.

Step 2. Click on the “particles” button and open “particle types”. Two types of particles are given: heavy and light.

Step 3. Display the stopwatch on the screen and the collision counter on the wall, noting the parameter readings. You can see that the width of the box is 10 nanometers by clicking the “width” button.

Step 4. Change the units of temperature and pressure. Convert K to ºC, atm to kPa.

Step 5. Insert the parts into the box using the part insertion tool. The blue particles are heavier. You can see how many of them there are in the particles section. And you can track the temperature and pressure changes inside the box.

Step 6. You can see the number of times the particles hit the wall in 10 ps (picoseconds) by connecting a collision counter to the wall.

Step 7. Heat the box. Monitor changes in temperature and pressure.

Step 8. Again count the number of times the particles hit the wall by connecting the collision counter to the wall.

Step 9. Now let the box cool down. Monitor changes in temperature and pressure.

Step 10. Try to count the number of times the particle hits the wall.

Step 11. Clear the box of particles using the clean button at the bottom.

Step 12. Try repeating the steps above, selecting lighter (red) particles.

Step 13. Try comparing the heavy and light particles. You can see that the lighter particles have a higher velocity than the heavier particles. 

Conclusion

With the virtual experiment, you were able to observe the motion of gas particles and the effect of temperature on it.