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Gas Laws: Can You Explain This?
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<td><font face="Verdana, Arial, Helvetica, sans-serif" size="4">A careful scientist looks at something as complex as the gas laws by looking at a single variable and seeing how other variables influence it. In the experiments with the model gas you should have been able to see how volume depends on pressure, if you hold the number of molecules and the temperature constant. Similarly, you could figure out how volume depends on temperature if you hold the number of molecules and the pressure constant. These are just two of the experiments. So, let's return to real world experiments and see how understanding the gas behavior can explain what has happened in the pictures below. </font></td>
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<font face="Verdana, Arial, Helvetica, sans-serif" size="4">❶ A
flask containing very cold liquid nitrogen (77°K, -196 °C , -321
°F) is prepared to be poured on a balloon.</font>
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<font face="Verdana, Arial, Helvetica, sans-serif" size="4">❷ The
liquid nitrogen is poured. </font>
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<img src="balloon3.gif">
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<font face="Verdana, Arial, Helvetica, sans-serif" size="4">❸ The
balloon looks almost flat.</font>
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<font face="Verdana, Arial, Helvetica, sans-serif" size="4">❹ As
the liquid nitrogen evaporates the balloon re-inflates.</font>
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>Which
relationship of the following best explains this experiment?</strong></font>
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V-P relationship
T-V relationship
T-P relationship
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>Use your
understanding to explain why the coke can on the first page collapsed. <a href="script:page:0:message <t><font face=Verdana>Assume the can was sealed when it was placed in the ice water.</font></t>;">Hint</a></strong></font>
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