Question

Consider a 50.0 g sample of CO₂ in a 150 cm³ vessel at 373 K. Calculate the pressure of the sample using each of the following approaches:
assuming perfect gas behavior (i.e, using the ideal gas law).
using the virial equation. The second virial coefficient for CO₂ at this temperature is B = -72.2 cm³/mol. [source: Atkins Phys. Chem, 11th ed.]
assuming the behavior is described by the van der Waals equation of state, with a = 3.610 atm dm⁶ mol-2, b = 4.29×10^-2 dm³ mol^-1. [source: Atkins Phys. Chem, 11th ed.]
using the reduced van der Waals equation. The critical constants for CO₂ are P_c=73.80 bar, V_c=0.0919 dm³/mol, T_c=304.2 K. [source: NIST Chemistry Webbook.]

Answer 1

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