| 所組別： | 化學學系 | 科目： | 物理化學 | 考試時間： | 6月14日第2節 |
| 一. 選擇題: (48%, 每題4分) |
| 1. | Of energy, work, ehthalpy, and heat, how many are state functions ? a)0 b) 1 c) 2 d) 3 e) 4 |
| 2. | For which process isD S negative? a)evaporation of 1 mole of CCl4 (l) b)mixing 5 ml ethanol with 25 ml water c)compressing 1 mole Ne at constant temperature from 1.5 atm to 0.5 atm d)raising the temperature of 100 g Cu from 275 K to 295 K. e)grinding a large crystal of KCl to powder |
| 3. | For an electron in a one-dimensional box, what is the minimum energy to excite the
electron from the ground state ? a)h2/8mL2 b) 2h2/8mL2 c) 3h2/8mL2 d) 4h2/8mL2 e) 5h2/8mL2 |
| 4. | Which of the following has the largest bond energy ? a)O2 b) O2- c) O22- d) O2+ e) O22+ |
| 5. | How many of the molecules C2, B2, H2, and N2
are paramagnetic ? a)0 b) 1 c) 2 d) 3 e) 4 In the reaction 3A + B + C ® D + E The rate law is -D [A]/ D t =k[A]2[B][C] In an experiment, [B]0 =[C]0 = 1.00 M and [A]0 = 1.00 x 10-4 M |
| 6. | After 3.00 min, [A] = 3.26 x 10-5 M. Calculate K. a)6.23 x 10-3 L3/mole3·s b) 3.26 x 10-5 L3/mole3· s c) 1.15 x 102 L3/mole3· s d) 1.00 x 108 L3/mole3· s e) none of these |
| 7. | The half-life for this experiment is a)1.11 x 102 s. b) 87.0 s. c) 6.03 x 10-3 s. d) 117 s. e) none of these |
| 8. | The concentration of C after 10.0 min is a)1.00 M b) 1.10 x 10-5 M. c) 0.330 M. d) 0.100 M e) none of these. |
| 9. | For how many f orbitals is n = 3 ? a) 0 b) 3 c)5 d) 7 e) 1 |
| 10. | Which one of the following decreases as the strength of the attractive intermolecular
forces increases ? a)the heat of vaporization b)the normal boiling temperature c)the extent of deviations from the ideal gas law d)the sublimation temperature of a solid e)the vapor pressure of a liquid |
| 11 | Which of the following should have the lowest boiling point ? a)Na2S b) HF c) NH3 d) N2 e) H2O |
| 12. | A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is
408 pm. The diameter of the metal atom is a)144 pm b) 204pm c) 288 pm d) 408 pm e) none of these. |
| 二. 觀念題: (30%) |
| 1. | (5%) Why are all gases not perfect gases ? |
| 2. | (5%) The value of the equilibrium constant for a given reaction is K = 6 x 10-13. What does that indicate about the spontaneity of the reaction ? |
| 3. | (5%) Account for the fact that 2s electrons are more strongly bound to the nucleus than are 2p electrons in the same atom. |
| 4. | (5%) Why doesn’t Henry’s law work for ammonia ? |
| 5. | (10%) What geometry do the following hybrid bonds possess ? a)sp b)sp2 c) sp3 d) sp3d e) sp3d2 |
| 三. 專有名詞解釋: ( 22%) |
| 1. | ( 5%) Colligative properties of solution |
| 2. | (5%) Extensive and Intensive properties |
| 3. | (6%) Path function and State function |
| 4. | (6%) 1st, 2nd and 3rd law of Thermodynamics. |
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