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Find the external workdone by the system in `K` cal, when `12.5 k` cal of heat is suppleid to the system and corresponding increasing in interanal enrgy is `10500` `J` `(J=4200 J//kcal)`

A

`15 K cal`

B

`12.5 kcal`

C

`10.0 kcal`

D

`7.5 kcal`

Text Solution

Verified by Experts

The correct Answer is:
C
`dW=dQ-dU`
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