The question:
A liquid mixture of n-butane and n-heptane (4:6 molal ratio) at 140F is to be separated in flash tank at 100 psia. The enthalpy concentration chart H-X is attached and should be used to answer the questions:
a) What are the temperature T1 at whch mixture starts to boil and minimum temperature at which complete evaporation is a achieved.
What are the ranges of the mole fraction of C4 in the vapor and liquid phases respectively in the temp ranges from T1 and T2?
could anyone please help explain to me the diagram and also how where I would start to obtain the answers?
thanks
chris