Last modified: Wed 12/31/1969 06:00:00 pm BCE

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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.

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In this experiment you will investigate the relationship between volume 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. The gas sample is in the graduated container at 298 Kelvin.

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


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 different 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. How would you describe the relationship between pressure and volume as illustrated in the data you collected? (Pick all that apply.)

a) As temperature decreases, volume increases;

b) As temperature decreases, volume decreases;

c) As temperature decreases, volume remains constant;

d) As temperature increases, volume increases;

e) As temperature increases, volume decreases;

f) As temperature increases, volume remains constant;

4. Which of the following graphs best describes the relationship between temperature and volume?






5. Which of the following best describes the algebraic relationship between V and T in your gas sample? (You may want to look at a plot of your data.)

a) V/T = constant

b) V + T = constant

c) TV2 = constant

d) VT = constant

e) V = T + constant

6. 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).


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

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