Example 7:

Applications of the 2nd Law

Text Box: burst Text Box: irreversible? Text Box: Vacuum 10 Liters Text Box: 3 bar 10 Liters 27° C

 

 

Find D s for this process:

, , ,

Is D s = 0?

We must devise a reversible process to go from the initial to final state, and find Qrev.

Consider an isothermal expansion from initial to final state:

Text Box: Adiabatic rev. D s = Adiabatic irrev. D s > 0 Non-adiabatic D s ><= 0