Card 12 / 35: Combustion of a fuel at 1200°K at a rate of 3 kW produces steam at 550°K.The steam then produces 2 kW of work and rejects some heat to 310°K. What is the second-law efficiency of the process?
A)
66%
B)
74%
C)
39%
D)
89%
E)
100%
Answer:
D) 89%
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