In following figs. Variation of volume by change of pressure is shown in Fig. A gas is taken along the path `ABCDA`. The change in internal energy of the tgas will be:
A
Positive in all the cases (1) to (4)
B
Positive in cases (1), (2), (3) but zero in case (4)
C
Negative in cases (1), (2), (3) but zero in case (4)
D
Zero in all the cases
Text Solution
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The correct Answer is:
D
Zero Internal energy is state function.
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