$[10$ points$]$ Consider a reactor that operates at steady state. Ethane and the theoretical amount of air flow into the reactor separately, and both at $25C$ and $1$atm. The fuel burns to completion and the combustion products exit at $627C,1$atm. Determine the rate of heat transfer for the reactor in units of $kJ$ per kmol of fuel flowing. The enthalpy of formation of ethane $(C_2{H}_6)$ is $-84,680k\frac{J}{k}$mole.

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