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.