Home | Calculators | Texas Instruments - Science | Charles' Law

Charles' Law

By David Proctor,

Katanning SHS

If you use or quote from the following programs, please acknowledge the author above.

• Charles' Law
• Instructions for Charles' Law

Charles' Law

By following a standard experimental format the following results were obtained for an experiment to examine the relationship between the temperature and volume of a fixed mass of gas at a constant pressure.

Temperature (oC)	Volume (mL)
4	23.4
25	25.2
50	27.1
72	29.0
95	31.0

1. Enter this data into two lists and produce a graph.

2. Look at the shape of the graph and predict a relationship between Temperature and Volume.

3. Use the calculator to determine a mathematical expression for the relationship between temperature and volume.

4. The X-intercept represents the temperature that must be reached for an ideal gas to have zero volume. This temperature is known as absolute zero and is the zero point for the Kelvin scale (or the absolute scale) of temperature. Use your calculator to predict a value for absolute zero, you may need to try several approaches.

5. Given that   K = ^oC - Y   intercept, use your calculator to convert your temperature readings from the Celsius scale to the Kelvin scale.

6. Replot the graph to show Temperature (in K) versus Volume with volume being on the Y axis. Have the calculator determine a mathematical expression for the relationship between absolute temperature and volume. Write a paragraph to explain the relationship between the absolute temperature and the volume of a fixed mass of gas at a constant temperature.

7. What is the significance of   X = 0  ? Use the Kinetic Theory to predict molecular motion at this temperature.