Chapter 17, Problem 6RQ

What is the standard free energy change, ∆G°, for a reaction? What is the standard free energy of formation, $\Delta G_{\text{f}}^{\circ }$ for a substance? How are $\Delta G_{\text{f}}^{\circ }$ values used to calculate $\Delta G_{\text{rxn}}^{\circ }$? How can you use Hess’s law to calculate $\Delta G_{\text{rxn}}^{\circ }$? How can you use ∆H° and ∆S° values to calculate $\Delta G_{\text{rxn}}^{\circ }$? Of the functions ∆H°, ∆S°, and ∆G°, which depends most strongly on temperature? When ∆G° is calculated at temperatures other than 25°C，what assumptions are generally made concerning ∆H° and ∆S°?