Ethane $($C$2$H$6)$ is burned at atmospheric pressure with the stoichiometric amount of air as the oxidizer. When the products and reactants are at $25$C$,$ and the water appears in the products as water vapor, calculate: $($a$).(3$ pt$)$ The heat rejected, in kJ$/$kmol fuel. $($b$).(3$ pt$)$ The LHV of ethane $($in kJ$/$kg fuel$),$ and the ratio of the LHV value in Table A$-27$ to the calculated LHV $($LHVTable$/$LHVcal$).$