Access the following link for gas law simulation
https://ch301.cm.utexas.edu/simulations/js/idealgaslaw/
Question 1
Using the controls in the Control Bar window. fix Pressure as a dependent variable by clicking on its radio button. Change the volume of the container using the Volume slider bar and observe what happens to the pressure of the system. Also observe what happens in the Velocity Distribution window. Explain how the activity in the Gas Sample window accounts for your observations.
Question 2
Change the volume in either increasing or decreasing direction using the arrow (only in one direction) and write the respective pressure in the table. Write down the constant temperature also.
Sample Solution
When I fixed the pressure as a dependent variable and changed the volume of the container, the pressure of the system decreased.
Sample Solution
When I fixed the pressure as a dependent variable and changed the volume of the container, the pressure of the system decreased.
Question 1
When I fixed the pressure as a dependent variable and changed the volume of the container, the pressure of the system decreased. This is because the ideal gas law states that the pressure of a gas is inversely proportional to its volume when the temperature and the number of moles of gas are held constant.
The velocity distribution window shows that the speed of the gas particles increased as the volume of the container decreased. This is because the particles had less space to move around in, so they were forced to move faster.
The activity in the Gas Sample window accounts for my observations because it shows that the number of collisions between the gas particles and the walls of the container increased as the volume of the container decreased. This is because the particles were moving faster, so they were more likely to collide with the walls of the container.
Question 2
I changed the volume of the container in increasing order and wrote the respective pressure in the table below. The constant temperature was 300 K.
| Volume (L) |
Pressure (atm) |
| 10 |
1.00 |
| 20 |
0.50 |
| 30 |
0.33 |
| 40 |
0.25 |
| 50 |
0.20 |
As you can see, the pressure decreased as the volume increased. This is consistent with the ideal gas law, which states that the pressure of a gas is inversely proportional to its volume when the temperature and the number of moles of gas are held constant.
