Example 3.2. An experiment on the growth rate of organisms requires an environment of humid air enriched in oxygen. Three input streams are fed into an evaporation chamber: liquid water, fed at the volumetric flow rate of 20 cm/min air (21.0 vol% O2 & 79 vol% N2) pure O2, with the molar flow rate of one-fifth (1/5) of the stream of air to produce an output stream with the desired composition The output gas is analysed and is found to contain 1.5 mol% of water Calculate all unknowns (Data: Density of water is 1.0 g/cm'; and MW of water = 18.02, of O2 = 32.00, & of N2 = 28.02) Assumption: Steady-state process Flow chart: Output stream 1.5 mol H2O Pure O2 *% Na Evaporation YO chamber Air 21 vol% O2 HO (1) 79 % N2 20 cm/min