64. Which of the following values is based on the Third Law of Thermodynamics?
(A) ΔH°_f = 0 for Al(s) at 298 K
(B) ΔG°_f = 0 for H2(g) at 298 K
(C)
(D) qsys ＜ 0 for H2O(l) → H2O(s) at 0°C
(E) None of these

複選題60. For a bi-concave thin lens, the radii of curvature are 10 and 20 cm. If an object is placed 15 cm in front of the mirror, what is the magnification of the image and is it a real or virtual? Upright or inverted? (thin lens’ equation: 1/p+1/q = (n−1)(1/R1−1/R2), the refractive index of glass is 1.5). (AB) 9.72 cm (virtual behind mirror) and M = 0.64, inverted (AC) 11.64 cm (virtual behind mirror) and M = 0.58, inverted (AD) 10.91 cm (virtual in front mirror) and M = 0.73, upright (AE) 8.69 cm (real in front mirror) and M = 0.25, inverted (BC) 12.45 cm (virtual behind mirror) and M = 0.53, upright (BD)一律送分

61. Select the answer with the correct number of decimal places for the following sum: 13.914 cm + 243.1 cm + 12.00460 cm = (A) 269.01860 cm (B) 269.0186 cm (C) 269.019 cm (D) 269.02 cm (E) 269.0 cm

62. Detection of radiation by a Geiger-Müller counter depends on ______. (A) the emission of a photon from an excited atom (B) the ability of an ionized gas to carry an electrical current (C) the emission of a photon of light by the radioactive particle (D) the ability of a photomultiplier tube to amplify the electrical signal from a phosphor (E) the detection of the sound made by decay particles

63. Please calculate the ΔS if ΔHvap is 66.8 kJ/mol, and the boiling point is 83.4°C at 1 atm, when the substance is vaporized at 1 atm. (A) -187 J/K mol (B) 187 J/K mol (C) 801 J/K mol (D) -801 J/K mol (E) 0

65. What are the values of bond order belonging to , respectively? (A) 1.5, 2.5 (B) 2.5, 1.5 (C) 2, 3 (D) 3, 2 (E) 2, 2

66. The lattice energy of NaI(s) is -686 kJ/mol, and its heat of solution is -7.6 kJ/mol. Calculate the hydration of energy of NaI(s) in kJ/mol. (A) -678 (B) -694 (C) +678 (D) +694 (E) +15.2

67. According to molecular orbital, which of the following molecules is diamagnetic? (A) HF (B) O2 (C) NO (D) (E)

68. Consider the figure, which shows ΔG° for a chemical process plotted against absolute temperature. Which of the following is an incorrect conclusion, based on the information in the diagram? (A) ΔH° ＞ 0 (B) ΔS° ＞ 0 (C) The reaction is spontaneous at high temperatures. (D) ΔS° increases with temperature while ΔH° remains constant. (E) There exists a certain temperature at which ΔH° = TΔS°.

69. Acetone can be easily converted to isopropyl alcohol by addition of hydrogen to the carbonoxygen double bond. Calculate the enthalpy of reaction using the bond energies given.  (A) -484 kJ (B) -366 kJ (C) -48 kJ (D) +48 kJ (E) +366 kJ

70. How many of the following molecules exhibit resonance: , O2F2? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5