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Question

If the first law of thermodynamics is represented by Δu = q + w. The q & w represent?


A
Work done on the system & heat added to the system respectively
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B
Work done by the system & heat added to the system respectively
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C
Heat added to the system & work done on the system respectively
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D
Heat take from the system & work done on the system respectively
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Solution

The correct option is C Heat added to the system & work done on the system respectively

Since q is positive, it represents the heat added to the system.

Since w is positive, it represents the work done on the system.


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