Question

Can the same Vander Waals' Gas
i) have more than one inversion tempeature?
ii) show both heating and cooling effect?

Answer 1

Answer on Question #43483-Physics-Molecular Physics-Thermodynamics

Can the same Vander Waals' Gas

i) Have more than one inversion temperature?

ii) Show both heating and cooling effect?

Answer

i) No. Vander Waals' Gas have one inversion temperature:

$$T _ {i} = \frac {2 a}{b k _ {B}},$$

where $k_{B}$ is Boltzmann's constant, $a$ and $b$ are constants depending on intermolecular forces and molecular volume, respectively.

ii) No. Vander Waals' Gas can show heating effect at very high temperature and cooling effect at very low temperature.

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