An engineer claims that he had invented a steady flow device that will take air at 4 bar and 20 Cand separate it into two streams of equal mass, one at 1 bar and −20 C and the second at 1 bar and 60 C...

An engineer claims that he had invented a steady flow device that will take air at 4 bar and 20 Cand separate it into two streams of equal mass, one at 1 bar and −20 C and the second at 1 bar and 60 C Furthermore the inventor states that his device operates adiabatically and does not require (or produce) work. Is such a device possible? (Air can be assumed to be an ideal gas with a constant heat capacity of Cp=29.3 J/(mole K)