Question

What is the unit of ‘b’ in Peng Robinson equation?

(a) Liter/mole

(b) Liter^2/mole^2

(c) Mole/Liter

(d) Mole^2/Liter^2

I got this question in semester exam.

I need to ask this question from Equations of State in section Real Gases: Equations of State, Single Component Two Phase Systems, Saturation & Condensation of Basic Chemical Engineering

Answer 1

Right option is (a) Liter/mole

Best explanation: Peng Robinson equation is p = RT/(V – b) – aα/[V(V + b) + b(V – b)], => unit of b = unit of molar volume = liter/mole.