Calculate the standard free energy change (kJ/mole) from the standard free energies of formation.?

For the reaction whose reactants and products are:











reactants: C (graphite) H2O (l)








products: CH3COOH (l)











calculate the standard free energy change (kJ/mole) from the standard free energies of formation.








The answer depends on how you balance the equation.


For this question balance the equation using the smallest ratio of WHOLE numbers.

Calculate the standard free energy change (kJ/mole) from the standard free energies of formation.?
Lancenigo di Villorba (TV), Italy





Since you start from GRAPHITE, I assign to Carbon the Standard values related to this allotropic form. As you know, International Committe stated that graphite as the Standard among the allotropic form of Carbon,


e.g. G°f,graphite = 0.00 J /mol.


Scientific literature report the other values that I need


G°f, water = -2.1E+7 J / mol


G°f, acetic acid = -4.8E+7 J / mol


Now, I calculate the "Gibbs Energy" 's Change :





2 C(graphite) + 2 H2O(l) ---%26gt; CH3COOH(l)





DeltaG° = G°f,acetic acid - 2 * (G°f, graphite + G°f,water) =


= -6.0E+6 J /mol





I hope this helps you.