We want to find the change in u for carbon dioxide between 600 K and 1200 K.
(a) Find it from a constant Cvo
(b) Find it from a Cvo evaluated from equation in A.6 at the average
c) Find it from the values of u listed
a) ∆u ≅ Cv0T = 0.653 × (1200 – 600) = 391.8 kJ/kg
