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1st Law of Thermodynamics

A thermodynam...

Question

A thermodynamical systems is changed from state $(p_{1} V_{2})$ to $(p_{2}, V_{2})$ by two different process, the quantity which will remain same will be

A

△ Q

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B

△ W

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C

△ Q + △ W

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D

△ Q - △ W

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Solution

The correct option is D $△ Q - △ W$
For all processes, change in internal energy $△ U = (△ Q - △ W)$ does not change, It depends only on initial and final state.

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