Cannot find the Temperature Change inside of a Tank

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The discussion revolves around the challenge of determining the internal temperature change in a pressurized tank containing real gas when additional gas is added at a different temperature. The original poster expresses frustration over the lack of clear solutions and references, particularly regarding the application of the Van der Waals equation of state instead of the ideal gas law. Key points include the complexities of energy transfer, mixing dynamics, and the need for an understanding of the open-system version of the first law of thermodynamics. Participants discuss the relationship between internal energy, enthalpy, and the effects of specific volume on these properties. The conversation highlights the need for further research and clarification on thermodynamic principles to address the problem effectively.
  • #91
Are you confident that you are getting the correct answer now? If so, I think were done here, right?
 
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  • #92
Yes! I notice that I get some elevated values from yours, but from my experience in programming, and the fact that I approached a part of the code slightly different than yours, that there is just a final little "something" I need to nail down. But I am confident that I will have this solved on my own very shortly.

So, sir...I want to thank you for your tremendous help on all of this. Thermo is one of my weak points, and I have a good grasp now on a portion of it. I had hoped that I would not have had to stretch this out so long, but my work schedule has been really tight these last months. Thanks for hanging in there with me!
 
  • #93
...and a little update. I found the cause of the disparity between your results and mine this afternoon. I had used the wrong coefficient in C_v = c * R. I had it set to the diatomic value of 2.5, and have changed it to 3.3. Now our results are identical to many decimal places.
 
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