According to the ideal gas law, a 10.59 mol
sample of argon gas in a 0.8229 L
container at 495.4 K should exert a pressure of
523.2 atm. By what percent does the pressure
calculated using the van der Waals' equation differ from the ideal
pressure? For Ar gas, a = 1.345
L2atm/mol2 and b =
3.219×10-2 L/mol.
??? %
Hint: % difference = 100 × (P ideal - Pvan
der Waals) / P ideal
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