Last modified: 3

It is OK to use your textbook, but if you can answers the questions without it that is OK too.

Do not press the RETURN or ENTER key while you are answering these questions. Your browser will interpret either the same as clicking on the Submit key.

Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.

First Name:

Last Name:


In this BCE we will investigate the effect of different variables on the pressure exerted by an ideal gas. To do this investigation we will use the simulation here. Clicking on the link above will produce a new page with the simulation. If your browser is not accessorized properly to run this software try clicking on the Molecular Workbench link. In the new window that appears click on '1. Install Java'. That should accessorize the browser so it can run the simulation. You may have to quit your browser.

Before starting the data collection, answer the following questions:

1a. Describe the particles; their speed is ? (Choose one)

b. The particles move in a _____ path between collisions. (Choose one)

c. The speed of a particle changes following the collision with _____.

d. What occupies the space between the gas particles in the gas sample? (Choose one)


2. Setup the simulation as described in each of the Experiments below and record the pressure.

Table I:

Exp #1
Exp #2

number of mol

1.00 mol

1.00 mol

Temperature (K)

275 K

275 K

Volume (L)

22.65 L

11.32 L

Pressure (atm)

3. Considering Table I describe how the two Experiments are similar and how do the two experiments differ?

4. How is the Pressure (atm) in the two experiments related to the variable you described in Question 3.

5. The size of the particles in Exp#1 are _____ compared to the size of the particles in Exp #2. (Choose one)


6. There are ______ collisions with the walls of the container per unit time in Exp#1 when compared to Exp #2. (Choose one)

7. The average speed of the particles ______ in Exp#2 than in Exp#1. (Choose one)

8. The particles travel ______distance between collisions with the walls of the container in Exp#2 when compared to Exp #1. (Choose one)

9. The force of the collisions with the walls of the container ______ in Exp#1 when compared to Exp #2. (Choose one)

10. The total number of collisions with the walls of the container ______ per unit time in Exp#1 when compared to Exp #2. (Choose one)


11. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

12. If there is one question you would like to have answered in lecture, what would that question be?