(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%.

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter2: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 2.32E: Many compressed gases come in large,heavy metal cylindersthat are so heavy that they need a special...

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Question

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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