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CHEM 1&2 Lab Manual & worksheets pg 128

CHEM 1&2 Lab Manual & worksheets pg 128 -...

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Experiment 10: Gas Laws General Chemistry I and II Lab Manual Dakota State University Page 128 of 232 rT V = where r is some constant, or r T V = Since r is constant for any two states 1 and 2, we can write 2 2 1 1 T V T V = Unfortunately, there IS a problem with Charles. See, if you have one of the temperatures set at zero, then the equation becomes undefined. How does one circumvent this problem? Well, Charles’ did so by extrapolating his data all the way to V=0. Such a condition, where the volume occupied by the gas is zero, is only possible for an ideal gas, and since there are no ideal gases, this becomes a hypothetical limit. It is not possible, and yet, in this impossible situation, Charles’ noticed something wonderful; no matter what gas, or mixture of gases he used, no matter what pressure he kept the gas, no matter how many moles of gas he started with, these lines all extrapolated to exactly the same temperature ; -273.15 o C.
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