Topic: Entropy:

• Entropy change after gas mixing (1):https://thermodynamics-engineer.com/2013/05/10/entropy_production-gas-mixing/
• Entropy change after gas mixing (2):https://thermodynamics-engineer.com/2013/07/01/entropy_change_air_mixing/
• Determine nozzle or diffuser through entropy change: https://thermodynamics-engineer.com/2013/06/27/nozzle-and-diffuser-exercise1/

Topic: Exergy:

• Exergy loss during throttling process: https://thermodynamics-engineer.com/2013/07/01/exergy-loss_throttling-process/