The enthalpy of combustion of propane, graphite and dihydrogen at 298K  are  $-2220.0kJmo{l}^{-1}$, $-393.5kJmo{l}^{-1}$ and $-285.8kJmo{l}^{-1}$ respectively. The magnitude of enthalpy of formation of propane  $\left(C_3{H}_8\right)$ is  $kJmo{l}^{-1}$. (Nearest integer)