In an air-liquefaction plant, it is proposed that the pressure and temperature of air that is initially at 1500 psia and 40oF be adiabatically reduced to 15 psia and - 100oF. Using Kay's rule and the departure charts, determine whether this is possible. If so, then how much work per unit mass will this process produce?

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21% O2 79% N2 by mole) 1500 psia 40°F