Calculate standard enthalpy of the reaction `Fe_2O_(3(s)) + 2CO_((g)) 2 Fe_((s)) + 3 CO_ (2(g)) from the following date `DeltafH^@ (Fe_2O_3) = - 824.2 kj mol^(-1)`, `DeltafH^@ (Fe_2O_3) = - 110.5 kj mol^(-1)` `DeltafH^@(CO_2) =- 393.5kJ mol^(-1)`