Chapter 7

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Unformatted text preview: ature in each tank and (b) the entropy generated during this process. Answers: (a) 133.55°C, 113.0°C; (b) 0.912 kJ/K 600 kJ A 0.2 m3 steam 400 kPa x = 0.8 Answer: 2.467 kg TNT 7–153 Using the arguments in Prob. 7–152, determine the total explosion energy of a 0.2-L canned drink that explodes at a pressure of 1 MPa. To how many kg of TNT is this explosion energy equivalent? 7–154 Demonstrate the validity of the Clausius inequality using a reversible and an irreversible heat engine operating between the same two thermal energy reservoirs at constant temperatures of TL and TH. B 3 kg steam 200 kPa 250°C FIGURE P7–156 7–157 Heat is transferred steadily to boiling water in the pan through its flat bottom at a rate of 800 W. If the temperatures of the inner and outer surfaces of the bottom of the tank are 104°C and 105°C, respectively, determine the rate of entropy generation within bottom of the pan, in W/K. High-temperature reservoir at TH 104°C QH QH Wnet, rev REV. HE QL 800 W Wnet, irrev IRREV. HE FIGURE P7–157...
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This document was uploaded on 11/28/2012.

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