If 30 kJ of heat flows out of a system and 15 kJ of work is done by the system, then what is the change in internal energy?
A) 85 kJ
B) 45 kJ
C) −45 kJ
D) 15 kJ
E) −15 kJ

Question

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The Answer of If 30 kJ of heat flows out of a system and 15 kJ of work is done by the system, then what is the change in internal energy?
A) 85 kJ
B) 45 kJ
C) −45 kJ
D) 15 kJ
E) −15 kJ

If 30 KJ of Heat Flows Out of a System