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(i) Calculate the efficiency of a certain power station operates with superheated steam at 300 °C (Th=573 K) and discharges the waste heat into the environment at 20 °C (T= 303 K). Consider that there is a efficiency loss due to mechanical friction is 4%.

(i) Calculate the efficiency of a certain power station operates with superheated steam at 300 °C (Th=573 K) and discharges the waste heat into the environment at 20 °C (T= 303 K). Consider that there is a efficiency loss due to mechanical friction is 4%.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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h) (i) Calculate the efficiency of a certain power station operates with superheated steam at 300 °C (Th=573 K) and discharges the waste heat into the environment at 20 °C (T = 303 K). Consider that there is a efficiency loss due to mechanical friction is 4%. (ii) Internal energy of a O₂ molecule is U-6.235 J/mol. Then, the oxygen molecule is exhibited a symmetric vibration of conservative type of forces with complete reversibility. Calculate its enthalpy.
Transcribed Image Text:h) (i) Calculate the efficiency of a certain power station operates with superheated steam at 300 °C (Th=573 K) and discharges the waste heat into the environment at 20 °C (T = 303 K). Consider that there is a efficiency loss due to mechanical friction is 4%. (ii) Internal energy of a O₂ molecule is U-6.235 J/mol. Then, the oxygen molecule is exhibited a symmetric vibration of conservative type of forces with complete reversibility. Calculate its enthalpy.
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