1. The problem statement, all variables and given/known data 2. Relevant equations Δu = ∫ [(a-Ru)+bT+cT^2+dT^3]dT 3. The attempt at a solution The answer of 6447kJ/kmol is given but I am struggling to get to this answer after integrating the above formula and inserting the given values. Firstly would the integral of [(a-Ru)+bT+cT^2+dT^3]dT be: [(a-Ru)+bT^2/2+cT^3/3+dT^4/4] ?