What is the change in internal energy of a system when it loses 10 kJ of energy and 5,000 J of work is done on the system?

Question

Quizplus · Accepted Answer

The change in internal energy (ΔU) is equal to the sum of the heat (Q) and work (W) done on or by the system (ΔU = Q + W). In this case, ΔU = -10 kJ - 5,000 J = -10.005 kJ or -10,005 J. Since only the answer choices are given in kilojoules or joules, the correct answer is -5 kJ.

What Is the Change in Internal Energy of a System