Why do you think that VDW eqn predictcs larger pressure for H2and a lower pressu

Question

Why do you think that VDW eqn predictcs larger pressure for H2and a lower pressure for Xe when compated to the ideal gaslaw? HINT: If you could see Xe it would look like a fuzzybeach ball and H2 would like like to ball bearings gluedtogether. Will rate ASAP! Why do you think that VDW eqn predictcs larger pressure for H2and a lower pressure for Xe when compated to the ideal gaslaw? HINT: If you could see Xe it would look like a fuzzybeach ball and H2 would like like to ball bearings gluedtogether. Will rate ASAP!

Explanation / Answer

One of many key flaws for the ideal gas EOS is that it assumesthat all molecules are spherical and take up no space (they do notinteract). Therefore, for H2, the hydrogen will take up morespace than expected because they will get tangled together becauseit is relatively linear. Because it takes up more spacebecause it is not perfectly spherical, it is as if the hydrogen isrepelling eachother (it can occur not as close as the IGEOSpredicts) - there are interactions from it being not perfectlyspherical (allthough it is still very small).
Xenon, because it is such a large molecule (unlike most othernoble gasses) can lose some of its electrons and become ionized. This ionization will too create interactions ignored in theIGEOS, which happen to be attractive, which leads to a lowpressure.
Hope that helps

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