HW10_Sol

# HW10_Sol - isothermal process to a volume 10 times larger...

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ME 3513 – Thermodynamics I Solutions to Homework Assignment # 10 – Chap. 8 – Entropy, Irreversible Processes Due: 11/29/2004 1. One kg water at 500oC and 1 kg saturated water vapor both at 200 kPa are mixed in a constant pressure and adiabatic process. Find the final temperature and the entropy generation for the process.

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2. A 12 kg steel container has 0.2 kg superheated water vapor at 1000 kPa, both at 200oC. The total mass is now cooled to ambient temperature 30oC. How much heat transfer was taken out and what is the total entropy generation?
3. A mass of 1 kg of air contained in a cylinder at 1.5 MPa, 1000 K, expands in a reversible

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Unformatted text preview: isothermal process to a volume 10 times larger. Calculate the heat transfer during the process and the change of entropy of the air. 4. Room air at 23oC is heated by a 2000 W space heater with a surface filament temperature of 700 K, shown in Fig. P8.122. The room at steady state looses the power to the outside which is at 7oC. Find the rate(s) of entropy generation and specify where it is made. ∫-= T Q d S gen / = [-2000 / (23+273)] – [-2000 / (7 + 273)] = 0.389 W/K...
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HW10_Sol - isothermal process to a volume 10 times larger...

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