Q 11-11-024NEETJEE MainMedium
An ideal gas expands from volume $V$ to $2V$ once isothermally and once adiabatically, starting from the same state. Which statement is correct?
Answer: (C) More work is done in the isothermal expansion
Concept. Work is the area under the $P$–$V$ curve; the adiabat falls more steeply than the isotherm from the same point.
Step 1. Compare. The isotherm keeps higher pressure (heat flows in), so more area under it.
Answer. More work is done in the isothermal expansion (Option C).
Solution by Sreeraj P, M.Sc Physics