18. For a reaction in a voltaic cell, both ΔH° and ΔS° are positive. Which of the following statements is true?
(A) E°cell will increase with an increase in temperature.
(B) E°cell will decrease with an increase in temperature.
(C) E°cell will not change when the temperature increases.
(D) ΔG° > 0 for all temperatures.
(E) None of the above statements is true.

11.For a reaction in a voltaic cell, both △H° and △S° are positive. Which of the following statements is true? (A) E°cell will increase with an increase in temperature. (B) E°cell will decrease with an increase in temperature. (C) E°cell will not change when the temperature increases. (D) G° > 0 for all temperatures. (E) None of the above statements is true.

11. For a reaction in a voltaic cell, both ΔHº and ΔSº are positive. Which of the following statements is true? (A) Eºcell will increase with an increase in temperature. (B) Eºcell will decrease with an increase in temperature. (C) Eºcell will not change when the temperature increases. (D) ΔGº> 0 for all temperatures. (E) None of the above statements is true.

24. For a reaction in a voltaic cell, both ΔH° and ΔS° are positive. Which of the following statements is true? (A)E°cell will increase with an increase in temperature. (B) E°cell will decrease with an increase in temperature. (C) E°cell will not change when the temperature increases. (D)ΔG°> 0 for all temperatures. (E) None of the above statements is true.

12. For a reaction in a voltaic cell, both ∆H° and ∆S° are positive. Which of the following statements is true? (A) E°cell will increase with an increase in temperature (B) E°cell will decrease with an increase in temperature (C) E° cell will not change when the temperature increases (D) ∆G° ＞ 0 for all temperatures (E) none of the above statements is true.

25. For a reaction in a voltaic cell both \(\Delta\text{H}^\circ\) and \(\Delta\text{S}^\circ\) are positive. Which of the following statements is true? (A)\(\text{E}^\circ_{\text{cell}}\) will increase with an increase in temperature. (B)\(\text{E}^\circ_{\text{cell}}\) will decrease with an increase in temperature. (C)\(\text{E}^\circ_{\text{cell}}\) will not change when the temperature increases. (D)\(\Delta\text{G}^\circ > 0\) for all temperatures. (E)None of the above statements is true.

38. For a reaction in a voltaic cell, both \( \Delta H^\circ \) and \( \Delta S^\circ \) are positive. Which of the following statements is true? (A)\( E^\circ_{\text{cell}} \) will increase with an increase in temperature. (B)\( E^\circ_{\text{cell}} \) will decrease with an increase in temperature. (C)\( E^\circ_{\text{cell}} \) will not change when the temperature increases. (D)\( \Delta G^\circ > 0 \) for all temperatures. (E)None of the above statements is true.

19. Which of the following is the best reducing agent? (A) Cl- (B) Cl2 (C) H2 (D) Mg (E) Mg2+

20. Which substance can be described as cations bonded together by mobile electrons? (A) S8(s) (B) Ag(s) (C) Kr(l) (D) HCl(l) (E) KCl(s)

21. Rate constants are dependent upon (A) the temperature (B) the orientation of the collision (C) the frequency of collisions (D) the activation energy (E) all of the above

22. The reaction A → B + C is known to be zero order in A with a rate constant of 5.2 × 10–2 mol/L • s at 25° C. An experiment was run at 25°C where [A]0 = 3.2 × 10–3 M. What is the half-life for the reaction? (A) 1.3× 101 s (B) 2.6× 10–2 s (C) 8.3× 10–2 s (D) 6.0× 104 s (E) 3.1× 10–2 s

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