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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.
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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.)