Applying the Entropy Balance: Closed SystemsA rigid,

Chapter 6, Problem 44P

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QUESTION:

A rigid, insulated container fitted with a paddle wheel contains 5 lb of water, initially at \(260^{\circ} \mathrm{F}\) and a quality of 60%. The water is stirred until the temperature is \(350^{\circ} \mathrm{F}\). For the water, determine (a) the work, in Btu, and (b) the amount of entropy produced, in \(\mathrm{Btu} /{ }^{\circ} \mathrm{R}\).

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QUESTION:

A rigid, insulated container fitted with a paddle wheel contains 5 lb of water, initially at \(260^{\circ} \mathrm{F}\) and a quality of 60%. The water is stirred until the temperature is \(350^{\circ} \mathrm{F}\). For the water, determine (a) the work, in Btu, and (b) the amount of entropy produced, in \(\mathrm{Btu} /{ }^{\circ} \mathrm{R}\).

ANSWER:

Step 1 of 3

We are required to calculate the work and the amount of entropy produced.

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