The standard enthalpy of formation of Fe_(2)O_(3)(s) is - 824.2 kJ mol^(-1) . Calculate the enthalpychange for the reaction :4 Fe (s) + 3O_(2) (g) rarr 2Fe_(2) O_(3) (s)

The standard enthalpy of formation of Fe_(2)O_(3)(s) is - 824.2 kJ mol

1.	The standard enthalpy of formation of Fe_(2)O_(3)(s) is - 824.2 kJ mol^(-1) . Calculate the enthalpychange for the reaction :4 Fe (s) + 3O_(2) (g) rarr 2Fe_(2) O_(3) (s)
Answer» SOLUTION :`Delta_(r)H^(@) = [ 2 xx Delta_(F) H^(@) ( Fe_(2)O_(3))] - [ Delta_(f)H^(@) ( Fe)+ 3Delta_(f) H^(@) (O_(2))]` `= [2(-824.2) ] -[0+0]` `= - 1648.4kJ`