The enthalpy change for the reaction is `1650 kJ`.
`2 Fe_2 O_3(s) rarr 4 Fe(s)+3 O_2(g)`
What is the enthalpy of formation of `Fe_2 O_3(s)` .

Calculate the standard enthalpy change for the reaction CH_4(g) +2O_2(g) rarr CO_2(g)+2H_2O(l) Given that the standard enthalpies of formation of CH_4(g),CO_2(g), and H_2O(l) are -74.8 kJ mol^-1, -393.5 kJ mol^-1 and -285.8 kJ mol^-1 respectively.

The enthalpies of combustion of S, SO_(2) and H_(2) are -298.2, -98.7 and -287.3.kJ mol^(-1) respectively. If enthalpy of the reaction SO _(x (g)) + H _(2) O _((f)) to H _(2 ) SO _(4 (f)) is - 130.2 kJ mol ^(-1), the enthalpy of formation of H_(2)SO_(4) is

Justify that the following reaction is a redox reaction: Fe_2O_3(s) + 3COg rarr 2Fe(s) + 3CO_2(g) ?

Justify the following reaction is redox reaction Fe_2O_3 (s) + 3CO (g) to 2Fe (s) + 3CO_2 (g)