(A) −5,540.4 kJ
(B) −1,385.1 kJ
(C) −791.2 kJ
(D) −197.8 kJ
(E) −791.2 kJ60 . The combustion of octane, C 8 H 18 , has ∆H°reaction <0and ∆S°reaction >0. Which of the
following statements is FALSE regarding the combustion of octane?
(A) The reaction is spontaneous at room temperature.
(B) The reaction is spontaneous at all temperatures.
(C) The reaction products are carbon dioxide and water vapor.
(D) The reaction is a redox process.
(E) The reaction is endothermic at room temperature.61 . For a given reaction, which of the following values can be determined from the value of
∆G°?
I. Cell potential, E°
II. Activation energy, Ea
III. Equilibrium constant, Keq(A) I and II only
(B) I and III only
(C) III only
(D) I, II, and III
(E) None of these62 . Calcium hydroxide, Ca(OH) 2 , has a lower solubility in water than some of the other Group
II hydroxides (Ksp = 4.0 × 10−6 at 25ºC). In a saturated solution of calcium hydroxide at this
temperature, what is the concentration of calcium ions?