$7.$ There is a well$-$insulated open combustion chamber that ethane $($C$2$H$6)$ goes into at $77$F and $1$ atm. The theoretical amount of air also enters at $220$F and $1$ atm. The combustion is complete. Determine:

a$)$ The temperature of the combustion products coming out $($F$)$

b$)$ If this experiment was performed the temperature of the products would not be the temperature determined in part a$,$ give $3$ reasons why the products would not be at the temperature calculated in part a$?$

c$)$ If additional air was added how would the temperature change and why?