An iron block of unknown mass at 1858F is dropped into an
Chapter 7, Problem 7158E(choose chapter or problem)
An iron block of unknown mass at 1858F is dropped into an insulated tank that contains 0.8 ft3 of water at 708F. At the same time, a paddle wheel driven by a 200-W motor is activated to stir the water. Thermal equilibrium is established after 10 min with a final temperature of 758F. Determine (a) the mass of the iron block and (b) the entropy generated during this process.
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