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A rigid insulated tank is suddenly filled from a high pressure line. The final temperature in the tank is

  • A.independent of the line temperature
  • B.higher than the line temperature
  • C.equal to the line temperature
  • D.lower than the line temperature

Answer: B

The flow work done pushing gas into the tank ends up as internal energy inside it, so the internal energy of the contents equals the enthalpy of the line gas. For an ideal gas that raises the temperature by the ratio of the specific heats.

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