What is the change in internal energy ($\Delta$E) when a system is heated with 35 J of energy while it does 15 J of work?

Question

Quizplus · Accepted Answer

The change in internal energy can be calculated using the first law of thermodynamics:

ΔU = Q - W

where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.

Substituting the given values, we get:

ΔU = 35 J - 15 J = 20 J

Therefore, the best choice is B, which corresponds to a change in internal energy of +20 J.

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