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Vapor pressure difference between Cd and Zn might allow the two metals to be separated by distillation. We now apply the law of conservation of mass to explore such a process. An alloy with a mass fraction of 50% Cd enters a distillation device (a separator) at 1000 kg/h and exits as two streams. At steady state, the gas stream contains 454 kg/h of Cd, and the liquid stream contains 472 kg/h of Zn. Write elemental balances on each constituent and prepare a complete mass balance. Show each stream on a diagram, and solve for all streams. |