A compressed liquid mixture of Ethane (z1 = 0.36) and Propane (22= 0.64) is to be flashed at 90 °F.The desire is for 40 a/o (a/o = atomic or mole percent) of the feed to exit as vapor. Please determine (a)the Pressure in psia and (b) the composition of the two exit streams. (See Chemical Engineering Thermodynamics, Balzhiser et al., Prentice Hall, Inglewood Cliffs, N.J) P_{l^{s a t}}=670 \mathrm{psia} P_{2^{x a t}}=180 \mathrm{psia}