What is the change in internal energy of the system ($\Delta$U)if 7 kJ of heat energy is evolved by the system and 99 kJ of work is done on the system for a certain process?

Question

Quizplus · Accepted Answer

The change in internal energy ($\Delta U$) is given by the first law of thermodynamics: $\Delta U = Q + W$, where $Q$ is the heat added to the system and $W$ is the work done on the system. Here, $Q = -7$ kJ (since heat is evolved) and $W = 99$ kJ. Thus, $\Delta U = -7 + 99 = 92$ kJ.

What Is the Change in Internal Energy of the System Δ\DeltaΔ

What Is the Change in Internal Energy of the System $\Delta$