Problem $3\mathrm{.}3$ create predictive models.

For an Ideal Gas the expression for pressure in terms of molar volume and temperature would be :

$P=\frac{RT}{V_m}$

One of the simpler and earlier EOS for a non$-$ideal gas is the Van der Waals equation of state, given as:

$P=\frac{RT}{V_m-b}-\frac{a}{V_m^2}$

Where:

$a=\frac{27(R{T}_c{)}^2}{64P_c},b=\frac{R{T}_c}{8P_c}$

And $T_c$ and $P_c$ are the critical temperature and pressure of the given chemical species.

$\%$ Difference $=\frac{100*|x_1-x_2|}{x_1}$