Chemistry 30

Calculate ΔG at 25°C for the following reaction, by first calculating ΔH and ΔS. Once you've found ΔH and ΔS, solve for ΔG using the formula:

ΔG = ΔH - T ΔS

Also - will this reaction be spontaneous at this temperature?

CH₃CO₂H _(l) + 2 O_{2 (g)} → 2 CO_{2 (g)} + 2 H₂O _(g)

Again find ΔG at 25°C for the reaction

CH₃CO₂H _(l) + 2 O_{2 (g)} → 2 CO_{2 (g)} + 2 H₂O _(g)

This time using the Table of Thermochemical Data and the formula

ΔG = ΣΔG^° _products - ΣΔG^° _reactants 

For the reaction Fe₂O_{3 (s)} + 3 CO _(g) → 2 Fe _(s) + 3 CO_{2 (s)}

ΔG° = -31.3 kJ. Calculate the standard free energy of formation of the ferric oxide, Fe₂O₃, if ΔG°_f of CO = -137 kJ/mol and ΔG°_f of CO₂ = -394 kJ/mol.