GKFix MCQ Question

What is the formula used to calculate the internal energy of vaporization?

• A. ∆vapU = ∆vapH° + ∆ngRT
• B. ∆vapU = ∆vapH° – ∆ng/R/T
• C. ∆vapU = ∆vapH° – ∆ngRT
• D. ∆vapU = ∆vapH° × ∆ngRT