A liquid mixture (100 gmol/s) of 40

mol% n-hexane/60 mol% n-heptane at 10

atm pressure and 25°C is sent through an

expansion valve, where the pressure

drops to 1 atm, and into a flash tank,

which is heated. Vapor and liquid are

separated in the tank and leave at 1 atm

and 85°C. Calculate the compositions

and flow rates of the vapor and liquid

streams leaving the tank. Calculate the

amount of heat (kJ/s) added to the tank.