Consider the following diagram that illustrates different states of a system. Derive an expression for the change in internal energy between State B and State D.

• A. ΔE_BD = ΔE₃ – ΔE₄
• B. ΔE_BD = ΔE₁ + ΔE₂
• C. ΔE_BD = ΔE₂ – ΔE₅
• D. ΔE_BD = ΔE₁ + ΔE₄

Answer: (C)