What is the change in internal energy ($\Delta$E)of a system when it is heated with 35.0 J of energy while it does 15.0 J of work?

Question

Quizplus · Accepted Answer

The change in internal energy (ΔU) of a system is given by the first law of thermodynamics: ΔU = Q - W, where Q is the heat added to the system and W is the work done by the system. Here, Q = 35.0 J and W = 15.0 J, so ΔU = 35.0 J - 15.0 J = +20.0 J.

What Is the Change in Internal Energy Δ\DeltaΔ E)of a System When It Is Heated with 35

What Is the Change in Internal Energy $\Delta$ E)of a System When It Is Heated with 35