A gaseous fuel mixture contains $241\%$ methane $(C{H}_4),307\%$ ethane $(C_2{H}_6),$ and the rest propane $(C_3{H}_8)$ by volume

Part A

When the fuel mixture contained in a $185L$ tank$,$ stored at $739$ Torr and $278K,$ undergoes complete combustion, how much heat is emited? $($Assume that the water produced by the combustion is in the gaseous state$)$

Standard Enthalpies $($or Heats$)$ of Formation $({}_{f}H)$ at $298K$

$\backslash$table$[[$Formula$,{}_{f}HkJmo{l}^{-1}$