Repeat problem 11-3-21 with argon entering the chamber at the same temperature as helium (all other conditions

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Repeat problem 11-3-21 with argon entering the chamber at the same temperature as helium (all other conditions remaining the same).
Problem 11-3-21
Helium at 200 kPa, 20oC is heated by mixing it with argon at 200 kPa, 500oC in an adiabatic chamber. Helium enters the chamber at 2 kg/s and argon at 0.5 kg/s. If the mixture leaves at 200 kPa, determine
(a) The temperature (T2) at the exit
(b) The rate of entropy generation (Sgen) due to mixing.
(c) Explain the change in entropy generation rate (Sgen).
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