Q. Consider the combustion of methane:

Suppose the reaction occurs in a flowing gas mixture of methane and air. Assume that the pressure is constant at 1 bar, the reactant mixture is at a temperature of 298.15K and has stoichiometric proportions of methane and oxygen, and the reaction goes to completion with no dissociation. For the quantity of gaseous product mixture containing 1 mol CO₂, 2mol H₂O, and the nitrogen and other substances remaining from the air, you may use the approximate formula C_p(P) = a + bT , where the coefficients have the values a = 297.0 JK^-1 and b = 8.520 x 10^-2JK^-2.