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PRACTICE · MEMBERSIntermediate · Single correct

PRACTICE / Entropy

Balance energy, then compare entropy

A quantity of heat 100 J passes from a reservoir at 600 K to a reservoir at 300 K. No work is produced.

Find the total entropy change of the two reservoirs.

Organize the givens & assumptions
  • Q = 100 J
  • Th = 600 K
  • Tc = 300 K

Reservoir temperatures remain constant; no energy storage or net entropy accumulation in a connecting path; heat transfer is from hot to cold.

  1. A−1/6 J/K-1/6\ \mathrm{J/K}
  2. B1/6 J/K1/6\ \mathrm{J/K}
  3. C0 J/K0\ \mathrm{J/K}
  4. D1/2 J/K1/2\ \mathrm{J/K}

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