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For this process (overall change) which ...

For this process (overall change) which is correct

A

q = 0, W = 0

B

`q = +ve, W = -ve`

C

`q = -ve, W_("on the system") = +ve`

D

`DeltaS_(sys) = 0, DeltaU_(sys) = 0, DeltaH_(sys) = 0`

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