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20 J of heat is supplied to a system and change in internal energy of the system is 10 J. If 2 J of heat is taken out then how much was work done on the system?

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20 J of heat is supplied to a system and change in internal energy of the system is 10 J. If 2 J of heat is taken out then how much was work done on the system?

(a) -2 J

(b) -4 J

(c) -6 J

(d) -8 J

I had been asked this question in quiz.

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

1 Answer

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Best answer
Right choice is (d) -8 J

The best I can explain: For the given process ∆U = W +Q.

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