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If 2500 cal of heat is added to a system...

If 2500 cal of heat is added to a system while the system does work equivalent to 3500 cal by expanding against the surrounding atmosphere, the value of `Delta U` for the system is ________ .

A

`-1000 cal`

B

`1000 cal`

C

`-6000 cal`

D

`6000 cal`

Text Solution

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The correct Answer is:
A
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