HW_15 - HW 15 1. During an isothermal heat rejection...

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HW 15 1. During an isothermal heat rejection process of a Carnot cycle, the working fluid experiences an entropy change of -0.7 Btu/R. If the temperature of the heat sink is 95°F determine the amount of heat transfer, the entropy change of the sink, and the total entropy change of the process. 2. 1 kg of water at 500°C and 1kg of saturated water vapor, both at 200kPa, are mixed in an adiabatic constant pressure process. Find the final temperature and entropy generated during the process. Is the process reversible, irreversible, etc. ? 3. A heat engine receives 6kW from a 250°C source and rejects heat at 30°C. Examine each of the following three cases using the Clausius inequality (ie. are these processes reversible? Impossible? Etc.) a. ± ² ³´ b. ± ² µ´ c. Carnot Cycle 4. How can you change the entropy of a substance going through a reversible process? 5. A substance undergoes a cycle where at the end of the cycle the substances specific volume, internal energy, enthalpy, and entropy are unchanged. Did anything happen during the cycle?
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This note was uploaded on 09/05/2010 for the course MEEN 315 taught by Professor Ramussen during the Summer '07 term at Texas A&M.

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HW_15 - HW 15 1. During an isothermal heat rejection...

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