Decide whether each of the following statements is true or false. If false, rewrite it to make it true.
(a) The entropy of a substance increases on going from the liquid to the vapor state at any temperature.
(b) An exothermic reaction will always be spontaneous.
(c) Reactions with a positive Δ_r H° and a positive Δ_r S° can never be product-favored.
(d) If Δ_rG° for a reaction is negative, the reaction will have an equilibrium constant greater than 1.