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Question: Answered & Verified by Expert
A thermodynamical system is changed from state $\left(\mathrm{P}_{1}, \mathrm{~V}_{1}\right)$ to $\left(\mathrm{P}_{2}, \mathrm{~V}_{2}\right)$ by two different process, the quantity which will remain same will be
PhysicsThermodynamicsBITSATBITSAT 2013
Options:
  • A $\Delta \mathrm{Q}$
  • B $\Delta \mathrm{W}$
  • C $\Delta \mathrm{Q}+\Delta \mathrm{W}$
  • D $\Delta \mathrm{Q}-\Delta \mathrm{W}$
Solution:
2703 Upvotes Verified Answer
The correct answer is: $\Delta \mathrm{Q}-\Delta \mathrm{W}$
For all process $\Delta \mathrm{U}=\Delta \mathrm{Q}-\Delta \mathrm{W}$

does not change as it depends on initial final states.

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