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When a system is taken from state f alon...

When a system is taken from state f along path `iaf, Q = 50 J` and `W = 20 J`. Along path `ibf, Q = 35 J`. If `W = -13 J` for the curved return path `f I, Q` for this path is

A

`33 J`

B

`23 J`

C

`-7 J`

D

`-43 J`

Text Solution

Verified by Experts

The correct Answer is:
D
`DeltaU` remains same for both path
For path `iaf = DeltaU = DeltaQ-Deltaw=50-20 = 30J`
For path `fi: DeltaU =-30J` and `Delta W = -13J`
`implies DeltaQ = -30-13 =-43J`.
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