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The van der Waals coefficient a (expressed in atm · dm6 · mol−2 ) for four different gases are: He 0.0341; H2 0.242; Kr 5.125; O2 1.364. Based on the data given above, the gas that will be expected to have the lowest critical temperature Tc: A. He. B. H2 . C. Kr. D. O2

The van der Waals coefficient a (expressed in atm · dm6 · mol−2 ) for four different gases are: He 0.0341; H2 0.242; Kr 5.125; O2 1.364. Based on the data given above, the gas that will be expected to have the lowest critical temperature Tc:
A. He.
B. H2 .
C. Kr.
D. O2 

Grade:12

1 Answers

Pooja
askIITians Faculty 477 Points
5 years ago
Dear Student,
Tc= 8a/27Rb
The gas having lowest value of ‘a’ will have lowest Tc
Therefore the answer is He

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