SOLVED

31) What is the sign of ΔSuniv for a biological system? A) positive B) negative C) zero D) It depends on the biological system. 32) Which of the following relationships is correct at constant T and P? A) ΔG is proportional to -ΔSuniv. B) ΔG > 0 represents a spontaneous process. C) ΔG > 0 represents an increase in kinetic energy. D) ΔG < 0 represents a nonspontaneous process. E) All of the above are correct. 33) Consider a reaction that has a positive ΔH and a positive ΔS. Which of the following statements is true? A) This reaction will be spontaneous only at high temperatures. B) This reaction will be spontaneous at all temperatures. C) This reaction will be nonspontaneous at all temperatures. D) This reaction will be nonspontaneous only at high temperatures. E) It is not possible to determine without more information. 34) Consider a reaction that has a positive ΔH and a positive ΔS. Which of the following statements is true? A) This reaction will be spontaneous only at low temperatures. B) This reaction will be spontaneous at all temperatures. C) This reaction will be nonspontaneous at all temperatures. D) This reaction will be nonspontaneous only at low temperatures. E) It is not possible to determine without more information. 35) Consider a reaction that has a negative ΔH and a positive ΔS. Which of the following statements is true? A) This reaction will be spontaneous only at high temperatures. B) This reaction will be spontaneous at all temperatures. C) This reaction will be nonspontaneous at all temperatures. D) This reaction will be nonspontaneous only at high temperatures. E) It is not possible to determine without more information. 36) Consider a reaction that has a positive ΔH and a negative ΔS. Which of the following statements is true? A) This reaction will be spontaneous only at high temperatures. B) This reaction will be spontaneous at all temperatures. C) This reaction will be nonspontaneous at all temperatures. D) This reaction will be nonspontaneous only at high temperatures. E) It is not possible to determine without more information. 37) Consider a reaction that has a negative ΔH and a negative ΔS. Which of the following statements is true? A) This reaction will be spontaneous only at high temperatures. B) This reaction will be spontaneous at all temperatures. C) This reaction will be nonspontaneous at all temperatures. D) This reaction will be nonspontaneous only at high temperatures. E) It is not possible to determine without more information. 38) Consider a reaction that has a negative ΔH and a negative ΔS. Which of the following statements is true? A) This reaction will be spontaneous only at low temperatures. B) This reaction will be spontaneous at all temperatures. C) This reaction will be nonspontaneous at all temperatures. D) This reaction will be nonspontaneous only at low temperatures. E) It is not possible to determine without more information. 39) Above what temperature does the following reaction become nonspontaneous? 2 H2S(g) + 3 O2(g) → 2 SO2(g) + 2 H2O(g)ΔH = -1036 kJ; ΔS = -153.2 J/K A) 6.762 × 103 K B) 158.7 K C) 298 K D) This reaction is nonspontaneous at all temperatures. E) This reaction is spontaneous at all temperatures. 40) Above what temperature does the following reaction become nonspontaneous? FeO(s) + CO(g) → CO2(g) + Fe(s)ΔH = -11.0 kJ; ΔS = -17.4 J/K A) 632 K B) 298 K C) 191 K D) This reaction is nonspontaneous at all temperatures. E) This reaction is spontaneous at all temperatures.