The process that you are designing requires that a vapor mixture of benzene and propane enter a holding tank at 480 K and 2 MPa, and a benzene mole fraction of 0.6. The design specifi es that 100 kg of vapor are in the tank. What volume must the tank be?

(a) Calculate using the ideal gas model.

(b) Calculate using the Redlich–Kwong equation.

(c) What is the percent error assuming an ideal gas?