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QUESTION 1: The oxygen in air is usually sufficient to sustain combustion, but it can be enriched to make combustion more efficient. In a certain process, it is required to produce a 50-50 mixture of oxygen and nitrogen by mixing air and pure industrial oxygen. How much (in kmol/d) of the 50-50 mixture can be produced from 250 m3/d of pure oxygen at STP? QUESTION 2: An experiment on the growth rate of a certain organism requires an environment of humid air enriched in oxygen. Three input streams are fed into an evaporation chamber to produce an output stream with the desired composition: A: Liquid water fed at a rate of 20 cm3/min B: Air (21% O2 and 79% N2) C: Pure O2 with a molar flow rate one-fifth of the molar flow rate of stream B The output gas is analyzed and is found to contain 1.5 mole% water. Draw and label the flowchart of the process, and calculate all unknown stream variables.

          QUESTION 1: The oxygen in air is usually sufficient to sustain combustion, but it can be enriched to make combustion more efficient. In a certain process, it is required to produce a 50-50 mixture of oxygen and nitrogen by mixing air and pure industrial oxygen. How much (in kmol/d) of the 50-50 mixture can be produced from 250 m3/d of pure oxygen at STP?

QUESTION 2: An experiment on the growth rate of a certain organism requires an environment of humid air enriched in oxygen. Three input streams are fed into an evaporation chamber to produce an output stream with the desired composition:
A: Liquid water fed at a rate of 20 cm3/min
B: Air (21% O2 and 79% N2)
C: Pure O2 with a molar flow rate one-fifth of the molar flow rate of stream B
The output gas is analyzed and is found to contain 1.5 mole% water. Draw and label the flowchart of the process, and calculate all unknown stream variables.

Added by Lisa C.

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