Determining Mixture Composition A gas mixture with a molar analysis of 20% C3H8 (...

Determining Mixture Composition

A gas mixture with a molar analysis of 20% C₃H₈ (propane) and 80% air enters a control volume operating at steady state at location 1 with a mass flow rate of 5 kg/min, as shown in Fig. P12.10. Air enters as a separate stream at 2 and dilutes the mixture. A single stream exits with a mole fraction of propane of 3%. Assuming air has a molar analysis of 21% O₂ and 79% N₂, determine

(a) the molar flow rate of the entering air at 2, in kmol/min.

(b) the mass flow rate of oxygen in the exiting stream, in kg/min.