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Exploring Charles' Law: Temperature-Volume Relationships of a Gas Sample, Schemes and Mind Maps of Chemistry

Instructions for collecting and analyzing temperature-volume data of a gas sample using an online simulation. Students are required to observe changes in the container, record data points, plot the temperature-volume graph, determine the equation of the line, and interpret the results in the context of charles' law. The document also includes questions for further exploration.

What you will learn

  • What factors cause a change in volume as the temperature is changed at the atomic level?
  • What is the temperature of the gas sample when the volume is lowered to zero mL?
  • What is the equation of the line that describes the relationship between temperature and volume of the gas sample?

Typology: Schemes and Mind Maps

2021/2022

Uploaded on 09/27/2022

damyen
damyen 🇺🇸

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Volume Temperature Relationships
Name________________________________ Lab Section___________________________
Problem Statement: How are temperature and volume of a gas sample related?
I. Data Collection:
A. Go to http://cheminfo.chem.ou.edu/~mra/home.html and open the Volume/Temperature
Simulation. Your screen should look like the figure.
The apparatus represents a container that is filled with a gas. The gas is confined in the
container by a movable weight. The volume of the gas can change with temperature
so that the pressure on the gas exerted by the weight remains constant. The temperature
can be changed by using the slide bar under the target temperature box. You can expose a
table that shows the temperature and volume data you collect by clicking on the ‘Show
Data Table” box.
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Volume Temperature Relationships

Name________________________________ Lab Section___________________________ Problem Statement: How are temperature and volume of a gas sample related? I. Data Collection: A. Go to http://cheminfo.chem.ou.edu/~mra/home.html and open the Volume/Temperature Simulation. Your screen should look like the figure. The apparatus represents a container that is filled with a gas. The gas is confined in the container by a movable weight. The volume of the gas can change with temperature so that the pressure on the gas exerted by the weight remains constant. The temperature can be changed by using the slide bar under the target temperature box. You can expose a table that shows the temperature and volume data you collect by clicking on the ‘Show Data Table” box.

B. Open the “Show Data Table” window. Using the slider bar, increase the temperature of the gas container. Describe what you observe happening. C. When the temperature in the container reaches the target temperature record the volume and temperature data in the table below. Collect 5 more data points for temperatures between 450 and 75 K. Convert the temperature to ºC. Volume mL Temperature K Temperature ºC II. Data Analysis and Interpretation A. Plot the temperature (ºC) of the air sample vs. its volume (mL) and determine the equation of the line. Record your results below. Include the graph in your report. (If you have a straight line you can use the equation for a straight line (y = mx + b). If the line is a curved line you can test to see if the plot is a power function (y = x^2 ) or a logarithmic function (y = log x). This can be made easier if you are using a graphing or data analysis program like Excel™. Your instructor can show you how to do this.)