$(30pt)$ Ethane $(C2H6)$ enters a reactor shown in the figure at a temperature of $25C$ and a pressure of

$100$kPa; It burns completely with $100\%$ of theoretical air at the same temperature and pressure.

Combustion products leaves the reactor at $627C,$ and $1066M\frac{J}{k}$mol$-$ethane heat transfer occurs from

the reactor to the environment at a surface temperature of $327C.$ Determine;

a$)(5pt)$ The balanced reaction

equation for $1$kmol of $C2H6.$

b$)(5$ pt$)$ Molar ratio of $H2O$ at

combustion products.

c$)$ pt$)$ Entropy generation

for $1$kmol of $C2H6,$ in

$k\frac{J}{k}$mol$-$ethane $*K$