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We are separating ethanol and water. All percentages are mol%. Find the q values and plot the feed lines. a) Feed is 60% ethanol and flashes in the column with v/f=0.37 b)Feed is 40% ethanol and is a two-phase mixture with liquid and vapor in equilibrium at a temperature of 84.1 degrees celcius c)Feed is 40% ethanol and is a liquid at 20 degrees celcius d)Feed is 40% ethanol and is a vapor at 120 degrees celcius e)Feed is 50% ethanol and is a subcooled liquid. One mole vapor must be condensed to heat 12 moles of feed to their boiling point f)Feed is 20% ethanol and 70% is vaporized in a flash distillation system. The products of the flash system are fed to distillation column. Calculate the two q values and plot the two feed lines.
Define your system to be the gas in the cylinder, and calculate the work transferred from the surroundings to the system from this expansion. Note that the pressure will change as the expansion takes place.
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