Exercise \#1: For refinery light ends processing plant, we need to separate the propane (1), butane (2), 1-butene (3), and pentane (4) in an isothermal flash unit which operates at 4 bar total pressure. Using the Raoult's law assumption calculate the following for a mixture composition of x1=0.10,x2=0.3,x3=0.35, and x4=0.25. a) Calculate the bubble point temperature of the mixture at 4 bar. b) The composition and amount of each phase produced in an isothermal flash at 4 bar and 25C if the liquid composition given above is the feed composition. Exercise \#1: For refinery light ends processing plant, we need to separate the propane (1), butane (2), 1-butene (3), and pentane (4) in an isothermal flash unit which operates at 4 bar total pressure. Using the Raoult's law assumption calculate the following for a mixture composition of x1=0.10,x2=0.3,x3=0.35, and x4=0.25. a) Calculate the bubble point temperature of the mixture at 4 bar. b) The composition and amount of each phase produced in an isothermal flash at 4 bar and 25C if the liquid composition given above is the feed composition