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Laspeyre's Price Index

A system unde...

Question

A system undergoes a process in which system releases 200 J heat and workdone by the surroundings is 300 J. Change in internal energy of the system is

A

−100 J

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B

100 J

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C

−500 J

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D

500 J

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Solution

The correct option is B
100 J

$Δ U = q + w$

= $- 200 + 300 = 100 J$

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