In an isothermal expansion, the heat supplied equals the:
AWork done
BMass gained
CVolume lost
DCharge moved
Answer & Solution
Correct answer: A. Work done
1. Internal energy of an ideal gas depends on temperature alone.
2. With temperature fixed, that energy does not change.
3. So the heat supplied all goes into work done by the gas.
_Source: NCERT Class 11 Physics Part II, Chapter 12, Thermodynamics._
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