PROBLEM #3 (30 points) Safety hazards associated with flashing of liquid mixtures: Flashing of liquid mixtures presents a safety problem in industrial vessels and thermodynamics provides us an opportunity to predict what will happen and what to do about it. When hydrocarbons, for example, are in vapor phase, they may reach a flammable point of ignition to start a fire in presence of oxygen and an igniter from a spark. For this reason pressure must be monitored and should be less than bubble pressure, and composition of vapor too in head (empty) space of such vessels must be monitored for presence of hydrocarbons which provide the threshold fuel for starting fires. A feed mixture of three hydrocarbons at 120 deg F has a composition of 21 = 0.60, Z2 = 0.15 & z3 = 0.25. The pressure in the vessel is 3.8 kPa. Assuming that Raoult's law applies use the data provided to answer the questions below in order to find fraction of vapor per mole of feed, {x;} and {y } for this mixture. i) Verify that the given pressure is between bubble-point pressure and dew-point pressure (4 points) ii) Determine K, for all species in the mixture (6 points) iii) Use Eq. (10.17) to determine the molar fraction of vapor per mole of feed, the answer should have an accuracy of 4 decimal points and to accuracy of 0.0001 or smaller close to 1. (10 points) iv) Determine the vapor and liquid compositions (10 points) Data: psat = 6.3855, Pogut = 2.2797 & Pgat = 0.8125 (all in kPa) Solution to part 3 - continued