postlab6 - Laura Lanier Lab L2 Exp 6 Calculating the...

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Laura Lanier Lab L2 Exp 6 Calculating the experimental value of R from the data, it is found to equal 0.07528 when corrected for the pressure of water vapor, an 8.448% error, and is found to equal 0.07713 when not corrected for the pressure of water vapor, a 6.143% error. These results are within a 10% error, which is acceptable for the purposes of the experiment but the validity of the results is called into question by the difference in the errors for the corrected and uncorrected values. It would seem that the uncorrected value should have a greater percent error; although these results seem odd, they can be explained by the fact that the mixture of gases in the air does not constitute an ideal gas. As air is not an ideal gas, it does not strictly adhere to the ideal gas law and hence may not be close to the ideal gas constant. The data from part B of this experiment proves that air follows Boyle’s Law (PV = k). This is shown by the graphs showing P vs. V and V vs. 1/P; the R 2 value for the graph of V vs. 1/P is much closer to 1 than that of the other graph, meaning the linear relationship between V and 1/P is closer to the actual relationship than a linear relationship between P and V. As this follows nature, it proves that air follows Boyle’s Law. The reason this behavior occurs is because as volume decreases, the number of molecules does not change, so they collide with each other and the walls of the container more often, causing an increase in pressure; conversely, as the volume increases, the molecules move further apart to fill up the
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postlab6 - Laura Lanier Lab L2 Exp 6 Calculating the...

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