Engineering Board Exam Reviewer · Thermodynamics · medium

In a constant-volume process, the heat transferred is equal to the change in:

  1. Enthalpy
  2. Entropy
  3. Internal energy
  4. Flow work

Answer

C. Internal energy

Solution

No boundary work is done (dV = 0), so Q = U = mcvΔT.

More Thermodynamics questions

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  2. One kilogram of air is compressed polytropically (n = 1.3) from 300 K to 400 K. What is the heat transfer? (cv = 0.7186 kJ/kg· K, k = 1.4)
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