Question:
One mole of an ideal gas is taken from state A to state B by three different processes,
(i) ACB (ii) ADB (iii) AEB as shown in the P–V diagram. The heat absorbed by the gas is
One mole of an ideal gas is taken from state A to state B by three different processes,
(i) ACB (ii) ADB (iii) AEB as shown in the P–V diagram. The heat absorbed by the gas is
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In P–V diagrams, larger enclosed area means more work done.
Updated On: Mar 20, 2026
- greater in process (ii) than in (i)
- the least in process (ii)
- the same in (i) and (iii)
- less in (iii) than in (ii)
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The Correct Option is A
Solution and Explanation
Step 1: Change in internal energy depends only on initial and final states, hence same for all paths.
Step 2: Heat absorbed Q = Δ U + W
Step 3: Work done is area under P–V curve. Path ADB encloses maximum area.
Step 4: Hence heat absorbed is maximum in process (ii).
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