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A system absorbs 640 J heat and does wor...

A system absorbs 640 J heat and does work. The change in internal energy `(DeltaU)` for the process is 380 J. The work done by the system is __ J

A

260

B

-260

C

1020

D

-380

Text Solution

Verified by Experts

The correct Answer is:
B
`q=+640 J" "Delta U=380 J" "w=?`
`Delta U=q+w`
`w=Delta U-q =380-640`
`w=-260 J`
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