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A scientist needs a refrigeration machin...

A scientist needs a refrigeration machine to maintain temperature of `-13^(@)C` for certain chemical process. How much work must be performed on the system during each cycle of its operation if `3000 J` of heat is to be withdrawn from the `-13^(@)C` reservoir and discharged to the room at `+27^(@)C`? Assume that the machine operates at `100 %` of its theoretical efficiency.

A

`65000 J`

B

`3000 J`

C

`154 J`

D

`133 J`

Text Solution

Verified by Experts

The correct Answer is:
B
`eta=(W)/(q_(2))`. Since `eta=1 :. W= q_(2)=3000J`.
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
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  7. Which of the following is an endothermic reaction?

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  8. The heat released when NH(4)OH and HCl neutralise is

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  9. The difference between the heats of reaction at constant pressure and ...

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