Calculate the standard change in Gibbs free energy for the reaction at 25 °C. Refer to the ΔG°f values. 3H2(g)+Fe2O3(s)⟶2Fe(s)+3H2O(g)

Answer 1

Look up the values for ∆Gºf and then do the following calculation:

sum of ∆Gºf values for the product - sum of ∆Gºf values for the reactants = ∆Gº for the reaction.

Remember to multiply the ∆Gºf values by the coefficient in the equation, e.g. for H2O(g) you multiply by 3.