Internal energy is equal to the heat absorbed in case of a/an ______________ process?
Correct answer: A. Constant volume
- A. Constant volume
- B. Polytropic
- C. Adiabatic
- D. Constant pressure
Explanation
For a closed system with only pressure-volume work, the first law gives δQ = dU + P dV. At constant volume, dV is zero, so the heat absorbed equals the increase in internal energy.
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