The Pressure is 1000 Kpa . Use Deprister Chart to find the K- values.

D15.* We have a flash drum separating 50.0 kmol/h of a mixture of ethane, isobutane, and n-butane. The ratio of isobutane to n-butane is held constant at 0.8 (that is, 2.cd/ 2.c4 = 0.8). The mole fractions of all three components in the feed can change. The flash drum operates at a pressure of I 'a and a temperature of 20C. If the drum is operating at V/F = 0.4, what must the mole fractions of all three components in the feed be