Question: A system does 5 . 2 J of work and also gives off 2 . 8 J of energy as heat. What is the change

A system does 5.2 J of work and also gives off 2.8 J of energy as heat. What is the change in the system's internal energy?
-8.0 J
-2.4 J
2.4 J
8.0 J
A system does 5 . 2 J of work and also gives off

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