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Question: Answered & Verified by Expert
If $\mathrm{Q}, \mathrm{E}$ and $\mathrm{W}$ denote respectively the heat added, change in internal energy and the work done in a closed cycle process, then
PhysicsThermodynamicsNEETNEET 2008 (Mains)
Options:
  • A $\mathrm{Q}=0$
  • B $W=0$
  • C $\mathrm{Q}=\mathrm{W}=0$
  • D $\mathrm{E}=0$
Solution:
1966 Upvotes Verified Answer
The correct answer is: $\mathrm{E}=0$
From the $1^{\text {st }}$ law of thermodynamics, $\mathrm{Q}=\mathrm{E}+\mathrm{W}$
For cyclic process, $E=0, \therefore Q=W \neq 0$

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