A1. In Figure 2-9 the feed plots as a two-phase mixture, whereas it is a liquid before introduction to the flash chamber. Explain why. Why can’t the feed location be plotted directly from known values of TF and z? In other words, why does hF have to be calculated separately from an equation such as Eq. (2-9b)?
A2. Can weight units be used in the flash calculations instead of molar units?
A3. Explain why a sequential solution procedure cannot be used when Tfeed is specified for a flash drum.
A4. In the flash distillation of salt water, the salt is totally nonvolatile (this is the equilibrium statement). Show a McCabe-Thiele diagram for a feed water containing 3.5 wt % salt. Be sure to plot weight fraction of more volatile ...