$($b$)$ The heat of reaction above $)$ will increase the temperature of the final gaseous $,Z_{?}$

mixture leaving the converter to $T_{\text{o}\text{u}\text{t}}$ according to $C_{p,\text{f}\text{i}\text{n}\text{a}\text{l}}=-{}_{rxn}\frac{H_{427C}}{T_{\text{o}\text{u}\text{t}}-T_{in}}.$

Estimate $T_{\text{o}\text{u}\text{t}}.$

Hint: $C_{p,\text{f}\text{i}\text{n}\text{a}\text{l}}$ is the heat capacity of the final gaseous mixture of all the gaseous species.

Therefore, product, remaining unreacted, and inert gaseous species all contribute to $C_{p,\text{f}\text{i}\text{n}\text{a}\text{l}}$

according to their compositions in the final gaseous mixture.