Use the van der Waals equation to calculate the pressure exerted by Therefore the molecules must collide a bit more frequently with the walls of the container, thus the pressure must be slightly higher. Gas Revsion Notes Document 9 pages. If you think about what happens when a liquid boils, you might expect that compounds with large values of a would have higher boiling points. In this section, we consider the properties of real gases and how and why they differ from the predictions of the ideal gas law.
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