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If the boundary of a system is at zero degrees centigrade, the change in entropy dS due to heat transfer dQ is zero.Question 9Select one:a.TRUEb.FALSE

Question

If the boundary of a system is at zero degrees centigrade, the change in entropy dS due to heat transfer dQ is zero.

Question 9 Select one:

  • a. TRUE
  • b. FALSE
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Solution

Final Answer

The correct answer is b.FALSE.

Explanation: The change in entropy dS dS is defined by the equation:

dS=dQT dS = \frac{dQ}{T}

where dQ dQ is the heat transfer and T T is the absolute temperature in Kelvin. If the boundary temperature is at zero degrees Celsius (273.15 K), and there is any non-zero heat transfer (dQ0 dQ \neq 0 ), the change in entropy dS dS would not be zero. Therefore, if heat is transferred, entropy changes regardless of the temperature, provided it is not absolute zero (0 K).

This problem has been solved

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