Calculate the adiabatic flame temperature of burning CH4 (g) at 1 atm when burned with 50%

excess air, and the reactants enter at 25oC.

Standard heat of formation:
Ch4: Hr = -49.963kj/mol
CO2: Hr = - 393.25 kJ/mol
H20(g) : Hr = - 241.835 kj/mol

Heat capacities (J/mol), T in oC:
CO2 (g) : 36.11 + 4.233×10-2 T - 2.887×10-5T2 + 7.464×10-9 T3

H2O (g) : 33.46 + 0.688×10-2 T + 0.7604×10-5T2 + 3.593×10-9 T3

O2 (g) : 29.1 + 1.158×10-2 T - 0.6076×10-5T2 + 1.311×10-9 T3

N2 (g) : 29 + 0.2199×10-2 T + 0.5723×10-5T2 - 2.787×10-9 T3