PPT Slide
Example: Two tanks filled with air are connected by a valve as shown. If the valve is opened and the gases are allowed to mix while receiving heat from the surrounding. The final temperature is 227°C. Determine (a) the final pressure of the mixture, (b) the amount of heat transfer during the mixing process. Assume ideal gas model is valid.
Assume: little change of KE & PE
Both the initial and the final states are in equilibrium
From table A-1, Tc=132.5 K, Pc=3.77 Mpa
Tr=3, Pr=0.0133 for tank 1
From Figure A-13, compressibility factor Z=1, good ideal gas assumption