Question

What is the pressure of CO2 at 0^oC, molar volume = 4 liter/mole, if B = – 0.053 liter/mole, C = 0.0026 liter^2/mole^2? (Use virial equation, neglect higher terms)

(a) 2.4 atm

(b) 4.1 atm

(c) 5.5 atm

(d) 6.9 atm

I had been asked this question in an interview for job.

Asked question is from Equations of State topic in division Real Gases: Equations of State, Single Component Two Phase Systems, Saturation & Condensation of Basic Chemical Engineering

Answer 1

Right option is (c) 5.5 atm

The best explanation: pV = RT(1 + B/V + C/V^2), => p = (0.0821*273/4)(1 – 0.053/4 + 0.0026/16) = 5.5 atm.