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An ideal gas has temperature T1 at the initial state i shown in the p-V diagram here. The gas has a higher temperature T2 at final states a and b, which it can reach along the path shown. The entropy change along the path to state a is

Select one:
  • a)
    smaller than b
  • b)
    zero
  • c)
    same as that along b
  • d)
    larger than b
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
An ideal gas has temperature T1 at the initial state i shown in the p-...
From i to a and i to b, change in temperature is same, hence dU remains same for both the processes. But i to a is isochoric process, hence work done is zero.
⇒ heat gained in process a is smaller, hence the entropy change along the pathto state a is smaller than b.
The correct answer is: smaller than b
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An ideal gas has temperature T1 at the initial state i shown in the p-V diagram here. The gas has a higher temperature T2 at final states a and b, which it can reach along the path shown. The entropy change along the path to state a isSelect one:a)smaller than bb)zeroc)same as that along bd)larger than bCorrect answer is option 'A'. Can you explain this answer?
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