Energy Balance in Closed Systems | Thermodynamics | (Solved examples)

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Learn about energy balance in closed systems, and how internal energy (U) changes when heat or work is done on/by the system. We also solve a few examples step by step to cover the material learned.

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Intro (00:00)
A 0.5-m^3 rigid tank contains refrigerant-134a (03:23)
A rigid 10-L vessel initially contains a mixture of liquid water (06:43)
A rigid container equipped with a stirring device (09:22)

Books used:
📘Çengel Yunus A. and M. A. Boles, Thermodynamics: an engineering approach. New York, NY: McGraw-Hill Education, 2016.
📘C. Borgnakke and R. E. Sonntag, Fundamentals of thermodynamics. Hoboken, NJ: Wiley, 2019.
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Tyrantscandrive
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I would travel to the ends of the earth and fight enemy's beyond my comprehension for you. Thank you so much!

portersspeedshop
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wow!! I'm currently reviewing some thermo concepts for heat transfer and you made this so easy!! thank you!

JesusMartinez-zuxl
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cardempire
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thank you!!! these videos are very helpful

Brooklyngilberto
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Why was a potentially changing quality considered in the second example but not in the first one, considering both situations are identical (two fluid mixtures in a sealed rigid tank being heated up)?

josephisrael
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Just wondering, what is specifically is evaporation internal energy? Is it the internal energy of a liquid undergoing evaporation? Maybe the internal energy of a liquid already evaporated (gas)?

JGambrosia
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do you think in the last problem you missed showing a dot? it is about rate of change.

narendradc
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Hello, in the second example you used the same equation to find the U1 and U2 by using the table and finding a new quality but did it differently in the first, is there a reason for that or both can be applied. Thank you very much for the videos

muheezolamilekan
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Need Air Compressor & Nozzle lectures.

AA-ejjv
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I wish I could give you my university tuition, as you help more than my professors

coreyfarrell
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how do you know q+w but you write q-w

moodbdullah