So as far as I know, $$Z=\frac{p_\mathrm{r}V_\mathrm{r}}{nRT},$$ where $\mathrm{r}$ denotes the subscript for real.

Solving it for a van der Waals gas gave me the following result, $$Z=1+\frac{p_\mathrm{r} b}{RT}-\frac{an}{VRT}+\frac{an^2b}{V^2RT},$$ where $V$ is the volume of the container.

This doesn't quite tally with the form I see in the textbooks. Where am I going wrong?

  • $\begingroup$ What the textbooks say ? BTW, why the new question ? Better would be to elaborate the original one. $\endgroup$
    – Poutnik
    Apr 13, 2019 at 5:47
  • $\begingroup$ Provide the procedure how you have achieved the result. $\endgroup$
    – Poutnik
    Apr 13, 2019 at 5:51
  • 1
    $\begingroup$ See Compressibility Factor Of Gases $\endgroup$
    – Poutnik
    Apr 13, 2019 at 6:50
  • $\begingroup$ I have trouble typing it out in that mathy way. As you can guess, I don't know latex and i do not plan to learn it anytime soon $\endgroup$
    – user226375
    Apr 16, 2019 at 17:05
  • $\begingroup$ I did not know it a month ago either. Basics are very easy. But the point is not in the formatting itself, but in elaborated effort presented in the question. $\endgroup$
    – Poutnik
    Apr 16, 2019 at 17:07


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