Last modified: Wed 12/31/1969 06:00:00 pm
CHEM 1314 Fall 2009 PLE27

Oklahoma State University

This is PLE # 27 for Tuesday, December 1, 2009. 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.


The PLE must be completed before class starts, for this PLE class has already met. It will not count towards your PLE total. NOTE: If class has not started and you receive this message, go ahead and do the PLE, I'll still count it.

First Name:

Last Name:

Laboratory Section:

 

In this experiment you will investigate the relationship between pressure and temperature for an ideal gas.

Data Collection:

1. The nature of the gas used in this experiment is not critical other than to know that the gas behaves ideally. To view the experimental setup and collect data click here. A new window will appear, resize the window as needed. The window will show a graduated container of an ideal gas at 298 Kelvin.

a) What is the volume of the ideal gas in the container before any temperature changes?

mL

Click on the button titled Show Data Table. Change the temperature of the gas in the container by moving the temperature scrolling button to 300.15 Kelvin. Note the data table now reflects the temperature and volume data. Collect at least four additional data points at differnet temperatures. Record all of your data in the table below.

2. Enter your data in the table below.

Temperature (Kelvin)

Volume (mL or cm3)

3. Do you see any pattern in the data you collected? Explain.

4. Here is a clip of a colleague, Nancy, demonstrating what happens to a sample of helium at room temperature being cooled to 77 K (-196 ˚C). Describe what happens when the sample of helium gas in the balloon is cooled.

(NOTE: To play this movie you need the QuickTime Player. If you do not have it go here to get it for your computer (go to the Download link). You can not play QT movies in the Library! If you have your textbook checkout page 372, Figure 10.8.)

 

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

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