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A system does a work of 15 J and the change in internal energy of the system is 10 J, what is the heat supplied to the system?

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A system does a work of 15 J and the change in internal energy of the system is 10 J, what is the heat supplied to the system?

(a) – 15 J

(b) 15 J

(c) – 25 J

(d) 25 J

I have been asked this question in final exam.

The query is from Energy balance for Different type of systems topic in chapter Miscellaneous of Chemical Process Calculation

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Best answer
Right option is (d) 25 J

Best explanation: 10 = – 15 + Q.

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