A flash drum operating at 300 kPa is separating a mixture that is fed in as 40 mol% isobutane,

25% n-pentane, and 35% n-hexane. We wish a 90% recovery of n-hexane in the liquid (that is,

90% of the n-hexane in the feed exits in the liquid product). F = 1000 kmol/h. Find Tdrum, xj, yj,

V/F.