$2-$ Ethane $($C$2$H$6)$ enters a reactor shown in the figure at a temperature of $25C$ and a pressure of

$100$kPa; It burns completely wtih $100\%$ 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$)$The balanced reaction equation for $1$kmol of $C2H6$

b$)$ Molar ratio of $H2O$ at combustion products

c$)$ Entropy generation for $1$kmol of $C2H6,$ in $k\frac{J}{k}$mol$-$ethane $K$