calculate ΔG° at 25 °C for CH3OH (l) + O2 (g) --> HCO2H (l) + H2O (l)

dGo rxn = (n*dGo products) - (n*dGo reactants).

Look up the dGo values for each, plug them into the above equation and solve for dGo reaction. Post your work if you get stuck.