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State whether the following is true or false.
A device can produce shaft work while its enthalpy rises.

  • A.True only at large scales
  • B.False only at small scales
  • C.True
  • D.False

Answer: C

It can if enough heat is supplied, since the energy balance allows heat input to cover both. A gas heated strongly while expanding through a turbine is the practical example. Energy conservation constrains the sum, not each term alone.

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