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Question
In a parallel flow heat exchanger operating under steady state, hot liquid enters at a temperature Th, in and leaves at a temperature Th, out. Cold liquid enters at a temperature Tc, in and leaves at a temperature Tc, out. Neglect any heat loss from the heat exchanger to the surrounding. If Th, in >> Tc, in, then for a given time interval, which ONE of the following statements is true?
Options:
A .  Entropy gained by the cold stream is GREATER than entropy lost by the hot stream
B .  Entropy gained by the cold stream is EQUAL to the entropy lost by the hot stream
C .  Entropy gained by the cold stream is LESS than the entropy lost by the hot stream
D .  Entropy gained by the cold stream is ZERO
Answer: Option A


-NA-



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