Learning undergraduate engineering thermodynamics might be less painful with a blog. I hope that students, faculty and interested observers will share their thoughts on the laws of thermodynamics, phase and chemical equilibrium and many related topics.
Please post any questions or discussion related to this problem as comments on this message. Feel free to answer other students' questions. I will check the blog M-F and once on the weekend. Dr. B
3 comments:
Anonymous
said...
Why don't there seem to be many questions on here? Anyways, is the R-134a in this problem supposed to be a subcooled liquid? If yes or no, how am I supposed to know?
Joe M: The night is young and you guys are very smart.
You know T and you can calculate specific volume. Check the Sat Temp tables like you did for problems 1 & 2. Compare the known Vhat to the Vhat for sat liq and sat vap.
A 0.5m3 vessel contains 10kg of refrigerant- 134a at -20degrees Celsius. Determine the pressure, total internal energy and volume occupied by the phase.
3 comments:
Why don't there seem to be many questions on here? Anyways, is the R-134a in this problem supposed to be a subcooled liquid? If yes or no, how am I supposed to know?
Joe M:
The night is young and you guys are very smart.
You know T and you can calculate specific volume. Check the Sat Temp tables like you did for problems 1 & 2. Compare the known Vhat to the Vhat for sat liq and sat vap.
A 0.5m3 vessel contains 10kg of refrigerant- 134a at -20degrees Celsius. Determine the pressure, total internal energy and volume occupied by the phase.
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